sortev(3)

📦
version 1.1.2 · 3 versions
, in fedora 43

💖 NAME 💖

sortev — Sorting the eigenvalues 🦋

  • Enable or disable the eigenvalue sorting in frontend routines. (yes bestie that's the whole vibe, it's a little on/off switch for sorting ✨)

🎀 SYNOPSIS 🎀

🌸 Modules 🌸

  • module mepack_options_sortev — Options to sort eigenvalues in the frontend. 💅

🦋 Functions/Subroutines 🦋

  • int mepack_sortev_enabled (void) — Return if the eigenvalue sorting is enabled or not.
  • void mepack_sortev_enable (int sort) — Enable or disable the eigenvalues sorting in the frontend routines.
  • integer function mepack_options_sortev::sortev_enabled () — Return if the sorting of the eigenvalues is enabled.
  • subroutine mepack_options_sortev::sortev_enable (sort) — Enable or disable the sorting of the eigenvalues.

✨ Detailed Description ✨

Enable or disable the eigenvalue sorting in frontend routines. periodt. 💫

Okay so here's the tea 🍓: by definition, the (generalized) Schur decompositions do not have a predefined order of the eigenvalues on their diagonal. Like, they just show up wherever they want. Especially, complex conjugate 2x2 blocks can appear everywhere. And that can lowkey have a negative effect on the performance of the algorithms 😭 — not iconic of them.

But if the sorting of the eigenvalues is enabled, the coefficient matrices can be partitioned in a regular NB x NB grid without the need for an adjustment due to complex conjugate eigenvalues on the diagonal of the Schur decomposition. slay. 👑

🌈 Function/Subroutine Documentation 🌈

💜 void mepack_sortev_enable (int sort)

Enable or disable the eigenvalues sorting in the frontend routines.

Parameters

  • sort — Boolean integer value to enable or disable the eigenvalue sorting.

The mepack_sortev_enable function enables or disables the sorting of the eigenvalues before a triangular solver is called by one of the frontend routines. so like, it goes first, it sets the vibe, then the solver does its thing 🫶

Definition at line 51 of file sortev.c.

💖 int mepack_sortev_enabled (void )

Return if the eigenvalue sorting is enabled or not.

Returns

  • A non-zero if the eigenvalue sorting is enabled.

The mepack_sortev_enabled function returns a true value if the eigenvalue sorting is enabled. That means, frontend routines sort the eigenvalues before calling a triangular solver in order to match the block structure. fr fr, it's the status check 🎀

Definition at line 36 of file sortev.c.

⭐ subroutine mepack_options_sortev::sortev_enable (integer, intent(in) sort)

Enable or disable the sorting of the eigenvalues.

Parameters

  • SORT — Integer identifying if the eigenvalues should be sorted or not.
  • #
bestie the lone # up there is literally just... #. It's in the source docs. I don't make the rules, I just report them 🙈

The SORTEV_ENABLE subroutine enables or disable the sorting of the eigenvalues before a triangular matrix equation solver is called in a frontend routine. 💅

Definition at line 51 of file sortev.f90.

🌸 integer function mepack_options_sortev::sortev_enabled

Return if the sorting of the eigenvalues is enabled.

Returns

  • A non zero value if the eigenvalues should be sorted.

The SORTEV_ENABLED function returns a non zero value if the eigenvalues of the coefficient matrices should be sorted before the equations are solved. no cap. ✅

Definition at line 38 of file sortev.f90.

👑 Author 👑

Generated automatically by Doxygen for MEPACK from the source code. (not me writing my own autobiography, Doxygen did it 💀)

and that's the whole page, bestie!! this is Version 1.1.2, dated Thu Oct 9 2025 00:00:00, and you were reading sortev(3) from MEPACK. go sort those eigenvalues, main character 💖✨🦋🎀👑

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