As discussed in http://www.mapleprimes.com/questions/144586-Op-Command-Isnt-Working-As-Expected , the indices change some time at run time so previously working command is not working for me.
I am trying to use
eq3 := applyop( u->Parts( u, phi[i](y) ), { 1,10,13,20 }, eq2 );
which clearly use the 'op' to get operands from eq2, but since the indices change at every run or on some run, the code is useless. The problem is that I have to integrate by parts some integrals of specfic structure and before this I just put there index and the command works perfectly alright but now its applying by parts integration on wrong integrals which are supposed to remain untouched.
How can I achieve this?
To make myself simple , how can I apply by parts integration on integrals having integrand like phi[i](y) * diff( w(y), y) without using op( rememeber eq3 uses 'op').
Here is my sheet: my_scratch_Sheet.mw
Many thanks!!
