[SCIP] Patch for zimpl: sin/cos/tan/asin/acos/atan

[Xu, Liding]

Dear Hartmut Henkel,

   I am not sure which are those functions you refer. The types of nonlinear expressions supported by SCIP can be found in SCIP documentation: https://scipopt.org/doc/html/group__DEFPLUGINS__EXPR.php

   According to check.zpl file, there are some trigonmetric functions: sin, cos, tan etc. Unfortunately, SCIP only support sin and cos functions, so tan functions should be manually expanded and expressed in terms of  sin and cos functions.


Best regards,

Liding Xu

________________________________
From: Scip <scip-bounces at zib.de> on behalf of Hartmut Henkel <hartmut_henkel at gmx.de>
Sent: Wednesday, February 11, 2026 3:48:55 PM
To: scip at zib.de
Subject: [SCIP] Patch for zimpl: sin/cos/tan/asin/acos/atan

Hi,

all these functions were "Not implemented yet" in zimpl, but the nice
scaffolding was there, so it was straight-forward to activate them.

Having these functions also in zimpl allows e. g., to use scip for
digital FIR filter design through a few zpl lines.

I would be glad if you would consider the attached patch file.

Best Regards
Hartmut Henkel
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