@Preben Alsholm It works well. Thank you very much

@Preben Alsholm It works well. Thank you very much

Your note is true.

And if changing add(a[r],r=i..j) to add('a[r]',r=i..j), I get message "Error, (in task) bad index into Vector" occasionally.

Your note is true.

And if changing add(a[r],r=i..j) to add('a[r]',r=i..j), I get message "Error, (in task) bad index into Vector" occasionally.

Thank you very much

It seems depending on computer hardware.

My computer of 32 digits only support 2^30 entries. If more entries, maple returns "Error, (in Vector) integer too large in context"

Thank you very much

It seems depending on computer hardware.

My computer of 32 digits only support 2^30 entries. If more entries, maple returns "Error, (in Vector) integer too large in context"

“文件夹” :)

By the way,can maple cloud work in China mainland in your computer?

So if and only if the first number of w is real and the rest numbers are conjugate symmetric, DFT of w has pure real numbers.If the number of rest numbers is odds,then the middle number should be conjugate symmetric to itself.So it must be a real number,is it?

So if and only if the first number of w is real and the rest numbers are conjugate symmetric, DFT of w has pure real numbers.If the number of rest numbers is odds,then the middle number should be conjugate symmetric to itself.So it must be a real number,is it?

Thank you for your reply

Thank you for your reply

there is no problem after chaning command

there is no problem after chaning command

After changing product to mul maple returns Error, unable to execute mul

After changing product to mul maple returns Error, unable to execute mul