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[Octave-bug-tracker] [bug #55968] [octave forge] (symbolic) Incorrect si

From: Mike Miller
Subject: [Octave-bug-tracker] [bug #55968] [octave forge] (symbolic) Incorrect simplify to sinc function
Date: Wed, 20 Mar 2019 21:17:48 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.75 Safari/537.36

Update of bug #55968 (project octave):

                 Summary: Incorrect simplify to sinc function => [octave
forge] (symbolic) Incorrect simplify to sinc function


Follow-up Comment #2:

Here's an idea of what we could do. In Matlab, they are a little more
restrictive over what can be passed in the second argument to rewrite. If I
pass an expression to rewrite with the target 'sinc', it's actually
interpreted by Matlab as a synonym for 'sincos'. So is the option 'sinco'.

SymPy seems to handle 'sinco' as an alias for 'sincos' already. We could
simply intercept and if the argument is exactly 'sinc', translate it into
'sincos' before handing it off to SymPy. What do you think?


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