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Re: [Maxima-discuss] Recognizing 1-variable polynomials ?
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From: Henry B. <hb...@pi...> - 2025-04-24 15:33:29
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<p>'polynomialp' looks great -- I thought I had already queried for
built-in functions, but I don't recall that one popping up.</p>
<p>Thanks!<br>
</p>
<div class="moz-cite-prefix">On 4/24/25 07:42, David Scherfgen
wrote:<br>
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cite="mid:CAM...@ma...">
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Is z a literal z, or can it be any variable?
<p dir="ltr">
If literal, try polynomialp(P, [z], 'numberp). Otherwise, get
the list of vars using listofvars, check if its length is 1 and
use that instead of [z].</p>
<br>
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<div dir="ltr" class="gmail_attr">Henry Baker <<a
href="mailto:hb...@pi..." moz-do-not-send="true"
class="moz-txt-link-freetext">hb...@pi...</a>>
schrieb am Do., 24. Apr. 2025, 16:18:<br>
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<p>Is there a simple way to "recognize" a polynomial P(z) in
a variable 'z' with *numerical* coefficients ?<br>
</p>
<p><br>
</p>
<p>I'd like to write a routine that errs out if the input
isn't a polynomial; if it has coefficients which aren't</p>
<p>numerical; if it is a polynomial in the wrong variable,
etc.</p>
<p><br>
</p>
<p>I don't mind if the polynomial is in factored form or
expanded form, or partially in between.</p>
<p><br>
</p>
<p>I don't mind if the polynomial has to be expanded in
order to be recognized.</p>
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