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Question: Why does a[1] change to a(1)?

Question:Why does a[1] change to a(1)?

Rouben Rostamian 8501 Maple
int indexed
June 05 2025
4

I seem to recall that a[k] and a(k) are treated interchangeably within a proc.  But I did not expect that to happen at the top level.  See the worksheet below.  Is there a way to keep indexed quantities as indexed?

> 

restart;
> 

kernelopts(version);

`Maple 2025.0, X86 64 LINUX, Mar 24 2025, Build ID 1909157`

> 

A := piecewise(x<0, a[1], a[2]);

A := piecewise(x < 0, a[1], a[2])

> 

int(1/A, x=-1..1);

1/a(1)+1/a(2)

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