Boundary Value Problem\ Symbolic solution

2021 6 14
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更新时间：2021 6 15
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I wanted to solve a sturm-liouville boundary value problem using the symbolic command dsolve, and I wanted to avoid using character vectors input as MATLAB suggests. but this wrong asnwer apears when using the classical symbolic way:

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Paul
Paul 2021-6-15
Ran in:

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Ran in:
Need to use sym(pi)
syms y(t)
cond = [y(0)==0,y(1)==0];
X = dsolve(diff(y,t,2)+sym(pi)^2*y==0,cond)
X = 

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