Advanced Search

Question: about "remove" and " select"

Question:about "remove" and " select"

belief111 33 Maple
select
October 13 2017
1

On the help page, the description says the remove function does the opposite of select.
when I run:

remove(has, D[1](xx[0]), {xx[0]})

it gives: D[1]()

while: select(has, D[1](xx[0]), {xx[0]})

produces: D[1](xx[0])

I find this during programming. 

Is there a way to remove the whole expression "D[1](xx[0])"

Many thanks!

 

 
Please Wait...