@rab285 For network installations, the "Tools > Check for Updates" menu item is intentionally greyed out because the site admin should take care of that, as opposed to each end user. Just contact him, and point him to our updates page.

@Kitonum That's actually documented behaviour, please see the ?depends help page (3rd bullet item in the Description section):

If f is a complicated expression, then depends may not be able to determine that it is independent of x.  In such cases, f should simplified before depends is called.

The last example on that help page is precisely yours.

Of course, one can argue whether an expression is complicated, but for performance reasons, the software does not invoke (possibly costly) simplifications in each situation.

I suggest that you upgrade to Maple 17. The new "local" feature makes your life easier. In particular, simplify and diff will then return the desired result.

I suggest that you upgrade to Maple 17. The new "local" feature makes your life easier. In particular, simplify and diff will then return the desired result.

That's because gamma(t) is also predefined; see ?initialconstants. So you will also have to unprotect(gamma(t));

Sorry, I had overlooked in your original posting that you need gamma(t).

That's because gamma(t) is also predefined; see ?initialconstants. So you will also have to unprotect(gamma(t));

Sorry, I had overlooked in your original posting that you need gamma(t).

Also, please replace "od" by "end do:". The former is really outdated and should no longer be used in new code. Unless you want to be a "man out of time". ;-)

@alienfetuseater Once the download is complete, the *.part file(s) will be erased automatically. That is a feature of your browser, not specific to our products. You can then run it like a command in your shell: "./Maple17Linux32Installer.bin". If it's not executable, try "chmod u+x Maple17Linux32Installer.bin" first.

It should then extract the archive inside it and launch the graphical installer automatically. No further tools are needed.

If you're still getting error messages, please download again. Size should be around 615 MB. (I can't tell the exact number of bytes since I have a slightly older version here at the moment.)

@alienfetuseater Once the download is complete, the *.part file(s) will be erased automatically. That is a feature of your browser, not specific to our products. You can then run it like a command in your shell: "./Maple17Linux32Installer.bin". If it's not executable, try "chmod u+x Maple17Linux32Installer.bin" first.

It should then extract the archive inside it and launch the graphical installer automatically. No further tools are needed.

If you're still getting error messages, please download again. Size should be around 615 MB. (I can't tell the exact number of bytes since I have a slightly older version here at the moment.)

Adding Dirichlet series and related features is certainly a very good suggestion. I'm sure our developers will consider it. Thanks for your post!

However, I'd be interested where that topic is part of the undergraduate curriculum...

@yhatagishi If you send us a complete example (ideally a minimal one), it should be easier to track down the problem. Please use the "Submit Software Change Request" from MaplePrimes' "More" menu, or send your code (or worksheet) to support@maplesoft.com. Thanks in advance!

@yhatagishi If you send us a complete example (ideally a minimal one), it should be easier to track down the problem. Please use the "Submit Software Change Request" from MaplePrimes' "More" menu, or send your code (or worksheet) to support@maplesoft.com. Thanks in advance!

@Carl Love That's very elegant, indeed. Thanks!

@Carl Love That's very elegant, indeed. Thanks!

@fredbel6 Well, in programming tasks like this, I usually prefer lists over sets (one reason being Equate with constructs such as [0$n]), but you can proceed as follows:

f := (a*b+1)*x^3+(a+b+1)*x^2*y^2+(a-b^3)*x*y^2+a*y^10;
# f := collect(f,[x,y]);
fcl := [coeffs(f,[x,y])];
fn := numelems(fcl);
feqns := Equate(fcl,[0$fn]);

g := (a*b-1)*x^3+(a+b-1)*x^2*y^2+(a-b^3)*x*y^2+b*y^10;
# g := collect(g,[x,y]);
gcl := [coeffs(g,[x,y])];
gn := numelems(gcl);
geqns := Equate(gcl,[0$gn]);

eqns := {op(feqns),op(geqns)};
sol := solve(eqns,[a,b]);

Note that (a-b^3) appears in both polynomials, so we have a non-empty intersection (hence a non-trivial union).