HPL_pdgesv0(3)

💖 HPL_pdgesv0 💖

okay bestie, so this is a page from the HPL library functions manual, section 3 — and honestly? it's giving "let's solve a giant linear system together" energy and i'm obsessed. 🫶

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✨ NAME ✨

HPL_pdgesv0 — factor an N x N+1 matrix. that's it. that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

#include "hpl.h"

void HPL_pdgesv0( HPL_T_grid * GRID, HPL_T_palg * ALGO, HPL_T_pmat * A );

like, three arguments, no cap. she's efficient. 👑

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🦋 DESCRIPTION 🦋

so HPL_pdgesv0 factors a N+1-by-N matrix using LU factorization with row partial pivoting. 🎀

the main algorithm is the "right looking" variant without look-ahead. yes girl, no look-ahead, she's living in the moment, main character energy fr fr. ✨

here's the tea though:

• the lower triangular factor is left unpivoted
• the pivots are not returned
• the right hand side is the N+1 column of the coefficient matrix

ngl if you were hoping for pivots back, she said no. they're simply not on the menu. 🙈

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💜 ARGUMENTS 💜

• GRID — (local input) HPL_T_grid * on entry, GRID points to the data structure containing the process grid information. it's the group chat roster, basically. 🌈
• ALGO — (global input) HPL_T_palg * on entry, ALGO points to the data structure containing the algorithmic parameters. all the settings, all the choices, the whole mood board. ⭐
• A — (local input/output) HPL_T_pmat * on entry, A points to the data structure containing the local array information. she goes in, she comes out changed. character development. 🧚

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👑 SEE ALSO 👑

the whole friend group, periodt:

• HPL_pdgesv (3)
• HPL_pdgesvK1 (3)
• HPL_pdgesvK2 (3)
• HPL_pdfact (3)
• HPL_binit (3)
• HPL_bcast (3)
• HPL_bwait (3)
• HPL_pdupdateNN (3)
• HPL_pdupdateNT (3)
• HPL_pdupdateTN (3)
• HPL_pdupdateTT (3)

iykyk — go read those next, bestie, they're literally all connected. 🔥

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and that's the page!! 💖 this whole thing came from HPL 2.2, dated February 24, 2016 — yes she's a 2016 icon and she's still slaying. mwah, bye!! 🎀✨💅