The program below coredumps once executed:

Engine mapleEngine = new Engine(new String[]{"java"}, new EngineCallBacksCustom(), null, null );

mapleEngine.evaluate("Groebner:-Basis(numer([lend2-lend2, lenh1-lenh1, trig7-lenh1/lenk1, degb1-degb1, degc1+degb1+degz1-180, degf1+degb1-degy1, degb1+degi1+degf1-180, degc1+degb1-degr1, degi1+degb1-degg1, degc2+degb1+dege1-180, degi2+dego1+degh2+degb1-360, lenl1-lenl1, lenb2/lenl1-lena2/lenn1, areat2-(1/2)*lenl1*lenh1, trig6-lenh1/lenj1, -lend1^2+lenh1^2+lenj1^2, lenb2/lenl1-lenl1/lend1, lend1+lend2-lenb2, lend1-lend1, lenl1/lend1-lena2/lenn1, trig2-lenj1/lend1, trig3-lenh1/lend1, trig4-lenh1/lend1, trig1-lenj1/lend1, areas2-(1/2)*lenh1*lenj1, lenj1+lenk1-lenl1, lenj1-lenj1, trig5-lenj1/lenh1, degb1+degi1-90, degz1-degm1-degi1, degi2-degx1-degm1-degi1, degi1-degi1, lenb2-lenb2, lena2-lena2, areaq2-(1/2)*lene2*lenn1, lene2^2+lenn1^2-lenp1^2, lenn1-lenn1, trig8-lenn1/lenp1, trig9-lenn1/lenp1, trig10-lene2/lenn1, trig11-lenn1/lene2, lenh1^2+lenk1^2-lenn1^2, lene2/lenk1-lenn1/lenh1, lene2/lenk1-lenp1/lenn1, lenn1/lenh1-lenp1/lenn1, trig12-lenk1/lenn1, trig13-lenh1/lenn1, trig14-lenh1/lenn1, trig15-lenk1/lenn1, arear2-(1/2)*lenh1*lenk1, lenk1-lenk1, trig16-lenk1/lenh1, degb1-45, degc1-60, lend1-3*2^(1/2)]), 'tord');");

The coredump Information:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_STACK_OVERFLOW (0xc00000fd) at pc=0x0000000012a53f47, pid=1860, tid=7456
#
# JRE version: Java(TM) SE Runtime Environment (7.0_51-b13) (build 1.7.0_51-b13)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.51-b03 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [fgbuni.dll+0xc3f47]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

--------------- T H R E A D ---------------

Current thread (0x0000000002d94800): JavaThread "main" [_thread_in_native, id=7456, stack(0x0000000002c90000,0x0000000002d90000)]

siginfo: ExceptionCode=0xc00000fd, ExceptionInformation=0x0000000000000001 0x0000000002c90000

Registers:
RAX=0x0000000000042f40, RBX=0x0000000000010bd0, RCX=0x00000000183ec740, RDX=0x0000000000010711
RSP=0x0000000002cc7c98, RBP=0x0000000002cc7cd0, RSI=0x0000000000000000, RDI=0x00000000183ec740
R8 =0x0000000000010bd0, R9 =0x0000000000042f40, R10=0x0000000002c84000, R11=0x0000000002c90000
R12=0x0000000019821178, R13=0x0000000000010711, R14=0x00000000132c9040, R15=0x0000000000010bd0
RIP=0x0000000012a53f47, EFLAGS=0x0000000000010206

Top of Stack: (sp=0x0000000002cc7c98)
0x0000000002cc7c98: 0000000000010bd0 0000000017ab3ec8
0x0000000002cc7ca8: 000000001299ff7c 000000000002783a
0x0000000002cc7cb8: 000000000002e025 00000000132c9050
0x0000000002cc7cc8: 0000000000000001 000000001345abac
0x0000000002cc7cd8: 0000000012997bdd 0000000000000018
0x0000000002cc7ce8: 00010bd000010bce 0000000000010711
0x0000000002cc7cf8: 00000000183ec740 000000001345abdc
0x0000000002cc7d08: 0000000000000000 00000000132c9050
0x0000000002cc7d18: 0000000000000000 0000000000000068
0x0000000002cc7d28: 0000000000010bd0 00007e5476285214
0x0000000002cc7d38: 0000000000010711 0000000000010bd0
0x0000000002cc7d48: 00000000132c9040 0000000000010711
0x0000000002cc7d58: 0000000019821178 0000000000000012
0x0000000002cc7d68: 00000000129a110a 0000000000010bd0
0x0000000002cc7d78: 0000000000000000 00000000183ec740
0x0000000002cc7d88: 000000001345abc4 00000000132c9040

Instructions: (pc=0x0000000012a53f47)
0x0000000012a53f27: d0 4d 0f 42 d3 65 4c 8b 1c 25 10 00 00 00 4d 3b
0x0000000012a53f37: d3 73 16 66 41 81 e2 00 f0 4d 8d 9b 00 f0 ff ff
0x0000000012a53f47: 41 c6 03 00 4d 3b d3 75 f0 4c 8b 14 24 4c 8b 5c
0x0000000012a53f57: 24 08 48 83 c4 10 c3 cc cc 48 83 ec 28 ff 15 26

Register to memory mapping:

RAX=0x0000000000042f40 is an unknown value
RBX=0x0000000000010bd0 is an unknown value
RCX=0x00000000183ec740 is an unknown value
RDX=0x0000000000010711 is an unknown value
RSP=0x0000000002cc7c98 is pointing into the stack for thread: 0x0000000002d94800
RBP=0x0000000002cc7cd0 is pointing into the stack for thread: 0x0000000002d94800
RSI=0x0000000000000000 is an unknown value
RDI=0x00000000183ec740 is an unknown value
R8 =0x0000000000010bd0 is an unknown value
R9 =0x0000000000042f40 is an unknown value
R10=0x0000000002c84000 is an unknown value
R11=0x0000000002c90000 is an unknown value
R12=0x0000000019821178 is an unknown value
R13=0x0000000000010711 is an unknown value
R14=0x00000000132c9040 is an unknown value
R15=0x0000000000010bd0 is an unknown value

Stack: [0x0000000002c90000,0x0000000002d90000], sp=0x0000000002cc7c98, free space=223k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [fgbuni.dll+0xc3f47]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j com.maplesoft.openmaple.Engine.evaluate(Ljava/lang/String;)Lcom/maplesoft/openmaple/Algebraic;+0
j com.tsinghuabigdata.TestMaple.main([Ljava/lang/String;)V+29
v ~StubRoutines::call_stub

--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
0x000000000b214000 JavaThread "Service Thread" daemon [_thread_blocked, id=8032, stack(0x000000000c910000,0x000000000ca10000)]
0x0000000002e8e000 JavaThread "C2 CompilerThread1" daemon [_thread_blocked, id=3304, stack(0x000000000c810000,0x000000000c910000)]
0x0000000002e89000 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=7072, stack(0x000000000c710000,0x000000000c810000)]
0x000000000b205800 JavaThread "Attach Listener" daemon [_thread_blocked, id=432, stack(0x000000000c610000,0x000000000c710000)]
0x000000000b1ae000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=7280, stack(0x000000000c510000,0x000000000c610000)]
0x0000000002e7f000 JavaThread "Finalizer" daemon [_thread_blocked, id=8060, stack(0x000000000c410000,0x000000000c510000)]
0x0000000002e74000 JavaThread "Reference Handler" daemon [_thread_blocked, id=4448, stack(0x000000000c310000,0x000000000c410000)]
=>0x0000000002d94800 JavaThread "main" [_thread_in_native, id=7456, stack(0x0000000002c90000,0x0000000002d90000)]

Other Threads:
0x000000000b183000 VMThread [stack: 0x000000000c210000,0x000000000c310000] [id=7992]
0x000000000b21e000 WatcherThread [stack: 0x000000000ce10000,0x000000000cf10000] [id=8124]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
PSYoungGen total 38400K, used 2663K [0x00000007d5c80000, 0x00000007d8700000, 0x0000000800000000)
eden space 33280K, 8% used [0x00000007d5c80000,0x00000007d5f19db0,0x00000007d7d00000)
from space 5120K, 0% used [0x00000007d8200000,0x00000007d8200000,0x00000007d8700000)
to space 5120K, 0% used [0x00000007d7d00000,0x00000007d7d00000,0x00000007d8200000)
ParOldGen total 86016K, used 0K [0x0000000781600000, 0x0000000786a00000, 0x00000007d5c80000)
object space 86016K, 0% used [0x0000000781600000,0x0000000781600000,0x0000000786a00000)
PSPermGen total 21504K, used 2827K [0x000000077c400000, 0x000000077d900000, 0x0000000781600000)
object space 21504K, 13% used [0x000000077c400000,0x000000077c6c2c38,0x000000077d900000)

Card table byte_map: [0x0000000005f50000,0x0000000006370000] byte_map_base: 0x000000000236e000

Polling page: 0x0000000001080000

Code Cache [0x0000000002e90000, 0x0000000003100000, 0x0000000005e90000)
total_blobs=216 nmethods=26 adapters=143 free_code_cache=48704Kb largest_free_block=49836288

Compilation events (10 events):
Event: 0.238 Thread 0x0000000002e8e000 nmethod 15 0x0000000002eff2d0 code [0x0000000002eff4e0, 0x0000000002f00240]
Event: 0.238 Thread 0x0000000002e8e000 23 sun.nio.cs.UTF_8$Decoder::decodeArrayLoop (543 bytes)
Event: 0.252 Thread 0x0000000002e89000 nmethod 22 0x0000000002f01090 code [0x0000000002f01260, 0x0000000002f024e0]
Event: 0.252 Thread 0x0000000002e89000 24 java.lang.String::replace (127 bytes)
Event: 0.255 Thread 0x0000000002e8e000 nmethod 23 0x0000000002efb610 code [0x0000000002efb840, 0x0000000002efc3b8]
Event: 0.255 Thread 0x0000000002e8e000 25 sun.nio.cs.UTF_8$Encoder::encode (361 bytes)
Event: 0.261 Thread 0x0000000002e89000 nmethod 24 0x0000000002efd010 code [0x0000000002efd160, 0x0000000002efd598]
Event: 0.261 Thread 0x0000000002e89000 26 sun.net.www.ParseUtil::encodePath (336 bytes)
Event: 0.262 Thread 0x0000000002e8e000 nmethod 25 0x0000000002ef69d0 code [0x0000000002ef6b20, 0x0000000002ef7008]
Event: 0.278 Thread 0x0000000002e89000 nmethod 26 0x0000000002f071d0 code [0x0000000002f07400, 0x0000000002f084d8]

GC Heap History (0 events):
No events

Deoptimization events (1 events):
Event: 0.229 Thread 0x0000000002d94800 Uncommon trap: reason=unreached action=reinterpret pc=0x0000000002ef7c70 method=java.lang.String.equals(Ljava/lang/Object;)Z @ 2

Internal exceptions (10 events):
Event: 0.033 Thread 0x0000000002d94800 Threw 0x00000007d5c90778 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jni.cpp:3991
Event: 0.161 Thread 0x0000000002d94800 Threw 0x00000007d5d5ca68 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.167 Thread 0x0000000002d94800 Threw 0x00000007d5d62858 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.200 Thread 0x0000000002d94800 Threw 0x00000007d5e000c0 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.200 Thread 0x0000000002d94800 Threw 0x00000007d5e001e8 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.236 Thread 0x0000000002d94800 Threw 0x00000007d5eb4ef8 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.238 Thread 0x0000000002d94800 Threw 0x00000007d5ec5658 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.239 Thread 0x0000000002d94800 Threw 0x00000007d5ecfe40 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.243 Thread 0x0000000002d94800 Threw 0x00000007d5edb170 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244
Event: 0.281 Thread 0x0000000002d94800 Threw 0x00000007d5ede4e8 at C:\re\jdk7u51\527\hotspot\src\share\vm\prims\jvm.cpp:1244

Events (10 events):
Event: 0.243 loading class 0x0000000002e82650
Event: 0.243 loading class 0x0000000002e82650 done
Event: 0.281 loading class 0x0000000002e31450
Event: 0.281 loading class 0x0000000002e313f0
Event: 0.281 loading class 0x0000000002e313f0 done
Event: 0.281 loading class 0x0000000002e31450 done
Event: 0.281 loading class 0x000000000cdbc760
Event: 0.281 loading class 0x000000000cdbc760 done
Event: 4.173 Executing VM operation: EnableBiasedLocking
Event: 4.173 Executing VM operation: EnableBiasedLocking done

Dynamic libraries:
0x00007ff66ea10000 - 0x00007ff66ea43000 C:\Program Files\Java\jdk1.7.0_51\bin\javaw.exe
0x00007ffc4d3d0000 - 0x00007ffc4d57c000 C:\Windows\SYSTEM32\ntdll.dll
0x00007ffc4c160000 - 0x00007ffc4c29e000 C:\Windows\system32\KERNEL32.DLL
0x00007ffc4a2c0000 - 0x00007ffc4a3d5000 C:\Windows\system32\KERNELBASE.dll
0x00007ffc48d50000 - 0x00007ffc48dde000 C:\Windows\system32\apphelp.dll
0x00007ffc33070000 - 0x00007ffc330c3000 C:\Windows\AppPatch\AppPatch64\AcGenral.DLL
0x00007ffc4cb80000 - 0x00007ffc4cc2a000 C:\Windows\system32\msvcrt.dll
0x00007ffc49f40000 - 0x00007ffc49f6e000 C:\Windows\SYSTEM32\SspiCli.dll
0x00007ffc4cc30000 - 0x00007ffc4cc84000 C:\Windows\system32\SHLWAPI.dll
0x00007ffc4d090000 - 0x00007ffc4d207000 C:\Windows\system32\USER32.dll
0x00007ffc4c630000 - 0x00007ffc4c7c4000 C:\Windows\system32\ole32.dll
0x00007ffc4a750000 - 0x00007ffc4bc68000 C:\Windows\system32\SHELL32.dll
0x00007ffc49720000 - 0x00007ffc49741000 C:\Windows\SYSTEM32\USERENV.dll
0x00007ffc4c9a0000 - 0x00007ffc4ca4a000 C:\Windows\system32\ADVAPI32.dll
0x00007ffc3fe10000 - 0x00007ffc3fe2e000 C:\Windows\SYSTEM32\MPR.dll
0x00007ffc4c4d0000 - 0x00007ffc4c611000 C:\Windows\system32\RPCRT4.dll
0x00007ffc4cca0000 - 0x00007ffc4ccf9000 C:\Windows\SYSTEM32\sechost.dll
0x00007ffc4bc70000 - 0x00007ffc4be81000 C:\Windows\SYSTEM32\combase.dll
0x00007ffc4d270000 - 0x00007ffc4d3c1000 C:\Windows\system32\GDI32.dll
0x00007ffc4a130000 - 0x00007ffc4a145000 C:\Windows\SYSTEM32\profapi.dll
0x00007ffc48990000 - 0x00007ffc48a42000 C:\Windows\SYSTEM32\SHCORE.dll
0x00007ffc4be90000 - 0x00007ffc4bec6000 C:\Windows\system32\IMM32.DLL
0x00007ffc4c370000 - 0x00007ffc4c4c2000 C:\Windows\system32\MSCTF.dll
0x00007ffc480b0000 - 0x00007ffc4832b000 C:\Windows\WinSxS\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.9600.17415_none_6240486fecbd8abb\COMCTL32.dll
0x00000000521a0000 - 0x0000000052272000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\msvcr100.dll
0x00000000519d0000 - 0x0000000052199000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\server\jvm.dll
0x00007ffc43dd0000 - 0x00007ffc43dd9000 C:\Windows\SYSTEM32\WSOCK32.dll
0x00007ffc4a720000 - 0x00007ffc4a742000 C:\Windows\system32\WINMM.dll
0x00007ffc4ca50000 - 0x00007ffc4ca57000 C:\Windows\system32\PSAPI.DLL
0x00007ffc4d210000 - 0x00007ffc4d26a000 C:\Windows\system32\WS2_32.dll
0x00007ffc4a210000 - 0x00007ffc4a23a000 C:\Windows\system32\WINMMBASE.dll
0x00007ffc4cc90000 - 0x00007ffc4cc99000 C:\Windows\system32\NSI.dll
0x00007ffc4a490000 - 0x00007ffc4a4df000 C:\Windows\SYSTEM32\cfgmgr32.dll
0x00007ffc4a1e0000 - 0x00007ffc4a208000 C:\Windows\system32\DEVOBJ.dll
0x00000000527f0000 - 0x00000000527ff000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\verify.dll
0x00000000519a0000 - 0x00000000519c8000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\java.dll
0x0000000051980000 - 0x0000000051995000 C:\Program Files\Java\jdk1.7.0_51\jre\bin\zip.dll
0x00007ffc30810000 - 0x00007ffc3082d000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\jopenmaple.dll
0x00007ffc293b0000 - 0x00007ffc293c1000 C:\Windows\SYSTEM32\maplec.dll
0x00007ffc24060000 - 0x00007ffc249a1000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\maple.dll
0x00007ffc46bf0000 - 0x00007ffc46c06000 C:\Windows\SYSTEM32\NETAPI32.dll
0x00007ffc4c120000 - 0x00007ffc4c136000 C:\Windows\system32\imagehlp.dll
0x00007ffc40ea0000 - 0x00007ffc40ea8000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\libhf.dll
0x0000000180000000 - 0x000000018000e000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\pthreadVC2.dll
0x00007ffc4cac0000 - 0x00007ffc4cb76000 C:\Windows\system32\COMDLG32.dll
0x00007ffc493c0000 - 0x00007ffc493cc000 C:\Windows\SYSTEM32\netutils.dll
0x00007ffc49d60000 - 0x00007ffc49d86000 C:\Windows\SYSTEM32\srvcli.dll
0x00007ffc46bb0000 - 0x00007ffc46bc7000 C:\Windows\SYSTEM32\wkscli.dll
0x000000000d710000 - 0x000000000da54000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\libmmd.dll
0x0000000052d60000 - 0x0000000052e29000 C:\Windows\WinSxS\amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.8428_none_88dcdb0b2fb19957\MSVCR80.dll
0x00007ffc49990000 - 0x00007ffc499e9000 C:\Windows\system32\mswsock.dll
0x00007ffc40280000 - 0x00007ffc40295000 C:\Windows\system32\napinsp.dll
0x00007ffc402a0000 - 0x00007ffc402ba000 C:\Windows\system32\pnrpnsp.dll
0x00007ffc46c80000 - 0x00007ffc46c9b000 C:\Windows\system32\NLAapi.dll
0x00007ffc49790000 - 0x00007ffc49834000 C:\Windows\SYSTEM32\DNSAPI.dll
0x00007ffc40270000 - 0x00007ffc4027d000 C:\Windows\System32\winrnr.dll
0x00007ffc402c0000 - 0x00007ffc402d4000 C:\Windows\system32\wshbth.dll
0x00007ffc40ed0000 - 0x00007ffc40eda000 C:\Windows\System32\rasadhlp.dll
0x00000000669c0000 - 0x0000000066a4a000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\libmaplegmp-10.dll
0x00007ffc37130000 - 0x00007ffc37133000 C:\Windows\SYSTEM32\icmp.Dll
0x00007ffc43d50000 - 0x00007ffc43d7a000 C:\Windows\SYSTEM32\iphlpapi.DLL
0x00007ffc43d30000 - 0x00007ffc43d3a000 C:\Windows\SYSTEM32\WINNSI.DLL
0x00007ffc43590000 - 0x00007ffc435fb000 C:\Windows\System32\fwpuclnt.dll
0x00007ffc22c70000 - 0x00007ffc24051000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\mstring.dll
0x00007ffc25f40000 - 0x00007ffc26026000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\modLA.dll
0x00007ffc26e70000 - 0x00007ffc26e87000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\arraytools.dll
0x0000000012990000 - 0x0000000012d69000 C:\Program Files\Maple 18\bin.X86_64_WINDOWS\fgbuni.dll
0x00007ffc364a0000 - 0x00007ffc3662a000 C:\Windows\SYSTEM32\dbghelp.dll

VM Arguments:
jvm_args: -Djava.library.path=C:\Program Files\Maple 18\bin.X86_64_WINDOWS;D:\smartmatch\autojudge_V3\dll -Dfile.encoding=UTF-8
java_command: com.tsinghuabigdata.TestMaple
Launcher Type: SUN_STANDARD

Environment Variables:
JAVA_HOME=C:\Program Files\Java\jdk1.6.0_45
CLASSPATH=.;C:\Program Files\Java\jdk1.6.0_45\lib;C:\Program Files\Java\jdk1.6.0_45\lib\tools.jar;D:\JAVA_PATH
PATH=C:\Program Files\Maple 18\jre\bin\client;C:\Program Files\Maple 18\bin.X86_64_WINDOWS;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Common Files\NetSarang;c:\Program Files (x86)\Intel\iCLS Client\;c:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Windows Live\Shared;JAVA_HOME\bin;JAVA_HOME\jre\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files (x86)\IDM Computer Solutions\UltraEdit\;C:\Program Files\Java\jdk1.6.0_45\bin;C:\Program Files\Java\jdk1.6.0_45\jre\bin;D:\Program Files\maven\bin;C:\Python27;C:\Python27\Scripts
USERNAME=bq
OS=Windows_NT
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 69 Stepping 1, GenuineIntel

--------------- S Y S T E M ---------------

OS: Windows 8 , 64 bit Build 9200

CPU:total 4 (2 cores per cpu, 2 threads per core) family 6 model 69 stepping 1, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1, sse4.2, popcnt, avx, avx2, aes, erms, ht, tsc, tscinvbit

Memory: 4k page, physical 8290760k(3738828k free), swap 9601480k(3195268k free)

vm_info: Java HotSpot(TM) 64-Bit Server VM (24.51-b03) for windows-amd64 JRE (1.7.0_51-b13), built on Dec 18 2013 18:40:56 by "java_re" with unknown MS VC++:1600

time: Fri Apr 24 13:48:05 2015
elapsed time: 5 seconds

Dear all;

Thank you very much for helping me to understand this problem.

I need your help for this question, it's seem for correct but when I run the code there is no dispaly of the solution with this command  dsolve({ode,ics}) ;

ode:=x*diff(y(x),x)+y(x)=x*exp(-x^2);

ics:=y(0)=1;

dsolve(ode);

dsolve({ode,ics}) ;

Hello maple users,

I want to compare 5 functions and see which one gives the best result (highest score). Unfortunatelly, I can't say one function always gives higher results than others. I have 8 variables and it makes the comparison complicated.

I assume 4 of them are constant and the other 4 or not.

c=0.1

p=1

w=0.5

wu=0.8

for Pb= 0:0.025:0.20                   Pb and Pa are probabilities, between 0-20, 0.025 increments
    for Pa= 0:0.025:(Pb-0.025)      ** Pa is always less than Pb
        for Ha= 0:50                      Ha takes values between 0-50
            for Hb= 0:(Ha-1)            ** Hb is always less than Ha

I attached the data file. I appreciate if someone tells me how to compare these functions. Should I put more assumptions to make it easier? Thank you.

data1.mw

I use Maple 15 to calculate some (nasty) integrals at my university. Because our university also offers a server on which I can run my Maple program, I would like to do that. (instead of occupying a workspace). But at the computer on my workspace the integrals are evaluated fine, but on the server the integrals are just returned with no numerical evaluation.

I constructed a MWE to look where it goes wrong. I set the printlevel to 25 so I could see what was going on. The MWE was suprisingly simple, on both machines (via ssh) I executed within maple:

This of course would normally just give 2*sqrt(2). On my workplace-pc it worked fine and it found 2.828427125. The server just returned the integral. After looking at the steps, they where both exactly the same until the following part:

Workplace-PC:

         General_flags := {_NoNAG, _DEFAULT, _NoMultiple}

            NAG_methods := {_d01ajc, _d01akc, _d01amc}

                        Method := _DEFAULT

                          HFDigits := 15

                                       -12
                        HFeps := 0.1 10

                                            -9
                    HFeps := 0.5000000000 10

   oldEvents := overflow = default, division_by_zero = default

                         callNAG := true

                            fcns := {}

                  result := 2.82842712474618807

Server:

        General_flags := {_NoNAG, _DEFAULT, _NoMultiple}

           NAG_methods := {_d01ajc, _d01akc, _d01amc}

                       Method := _DEFAULT

                         HFDigits := 15

                                      -12
                       HFeps := 0.1 10

                                           -9
                   HFeps := 0.5000000000 10

   oldEvents := overflow = default, division_by_zero = default

                         callNAG := true

                           fcns := {}

       overflow = exception, division_by_zero = exception

It seems that the server has a problem with the singularity and thus throwing an exception, but I just don't get why. The Maple-versions are both the same.

Does somebody know what this could be?

Hello!

So as the title says i have a problem with solution of second order differential equation system.

The problem is that after i set some initial conditions and check the solution when the time equals zero, the solution graph is completely different from my initial conditions which is obviously incorrect. I know that i can change "spacestep" parameter, but i am not sure if it is the only way to fix the problem. Are there any other ways to fix this?

Here is a part of my code if it helps

r0=1.570796327
theta0=6.000000000

I need to minimize an Integration

Is there a package or an interactive package management utilities?

Hi there,

I am trying to compute the following, and I am getting this error.

> A := map(convert, M, unit_free)*Unit('m'*(1/'s'^2));
(I had to put the Unit('m'*(1/'s'^2)) because the original units were kNm/s^2 (kg), and even though I simplified it, it's still using kNm/s^2, and leaves the m/s^2 for some reason when I try to remove the units. I tried simply changing the units on the original matrix, but the units menu has disappeared from the right-click menu!!)

> B := map(convert, K, unit_free);

Loading RealDomain;

solve;

Error, (in assuming) when calling 'Engine:-Dispatch'. Received: 'should not happen: Rename expects the input to contain unknown functions'

Why is it giving me this error? omega is an unknown variable that I am trying to solve for. I am going a modal analysis, so maybe there is a better way to find omega?

Any help appreciated!

Raquel

I have document Maple.mw. I want to copy all text to mathtype. How do I copy and paste?

Link download: maple document

Why does the following not work?

factors(x^4-1)

Hi

I have problem with 3Dplotting of this piecewise...can anyone help me please?!

since i know the output will be a value between 0 and 1 can i plot it for different values of Mu in this range to eliminate a dimension?

Mu(x1, x2, x3) = piecewise(`or`(`or`(x1 > 55, x2 > 10), y >= 2), 1, x1 < 35 and x2 <= 10 and x3 < 1, (1/10)*x2, `and`(`and`(x1 < 35 and x2 <= 10, x3 >= 1), x3 <= 2), max((1/10)*x2, x3-1), `and`(`and`(`and`(x1 >= 35, x1 <= 55), x2 <= 10), x3 <= 1), 1-((55-x1)*(1/20))((10-x2)*(1/10)), `and`(`and`(`and`(`and`(x1 >= 35, x1 <= 55), x2 <= 10), x3 >= 1), x3 <= 2), max(x3-1, 1-((55-x1)*(1/20))((10-x2)*(1/10))))

Thank you very much in advance...

Maple show "

Error, (in simplify/hypergeom/baseHG) Maple was unable to allocate enough memory to complete this computation. Please see ?alloc"

after I finish the equations set and run it.

what's the reason?

Dear all,

I have one probem in using Maple in comparison with Matlab.

Generally, when using Matlab, I write a long program with 500 lines (for example) and where I use some matricial calculations and other. When I want to repeat this program for some parameters (variables) many times, I transform the program to a procedure "Function" with just adding the command Function in the start of the program.

When using Maple, I have a difficulty to transform a long program which I want to repeat for some variables to a procedure "proc". The program uses packages like LinearAlgebra and other procedures.

Is there a simple way to transform a long Maple program to a procedure which should be repeated many times for some variables in Maple. 

I have especially problems with the commands local, global, use (for packages), etc.. and the warning related to the variables. It is not easy for a long program with many variables to write them in local or global variables.

Thank you.

I find mapleform software   but I dont know how to use , and does anyone know another method to convert.  I know use 

> with(MmaTranslator);
> MmaToMaple();  

I can  automatically translated .nb files.  but this have  

Error, (in readline) file or directory does not exist
Error, (in readline) file or directory does not exist
Error, (in readline) file or directory does not exist
Error, (in readline) file or directory does not exist

another Error, missing operator or `;`

also I try to use 

> with(MmaTranslator);
> FromMmaNotebook(Mma_notebook_filename, options);

I still dont know how is works?  can you explains for me and show me some example  , here is my example files.plot.zip

Hello,

I need to model some spherical joints with damping.

Apparently, contrary to revolute joints, it seems that it is not possible to add damping in spherical joints. Indeed, contrary to the revolute joint where there is an option to put spring or damping element, i don't find this option in the spherical joint. 

Do you have a idea to model spherical joints with damping (without changing the spherical joint)?

Thanks a lot for your help

During a lengthy computation of mine - done using a well established and scientifically sensible external package - I get a Too many level of recursion error in PDEtools/NumerDenom.

Since it has always worked fine for simpler computation with the exact same code, I am wondering whether, with a bigger bound of the level of recursion, the computation could be succesful.

Which is the max level of recursion than maple allows?

Is it possibile to manually (at one's own risk) raise it, in the same line as raising, for instance, stacklimits kernel option?