lis_array_ge(3f)

💖 lis_array_ge — bestie's guide to matrix un-inverting 💖

okay so this is lis_array_ge(3f) from the Lis Library Functions, and she's here to do ONE thing and do it iconically: flip your matrix inside out. no cap. 🦋

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✨ NAME ✨

lis_array_ge — calculate the inverse of the matrix with the Gaussian elimination 💅

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✨ SYNOPSIS ✨

subroutine lis_array_ge(LIS_INTEGER n, LIS_SCALAR a(), LIS_INTEGER ierr);

that's it, that's the whole vibe. one subroutine, three args, zero drama. periodt. 🎀

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✨ DESCRIPTION ✨

Calculate the inverse A of matrix A with the Gaussian elimination.

that's literally the whole thing, bestie. you hand her a matrix, she hits it with the Gaussian elimination, and out comes the inverse. it's giving math main character energy. 🔥

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✨ INPUT ✨

• n — the size of the matrix. like, how big she is. n × n, you know the drill. 👑
• a — the array that stores matrix A of size n * n. this is your matrix, your baby, the thing you're about to invert. 🫶

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✨ OUTPUT ✨

• a — the inverse of the array. yes queen, same name, same array, but now it's holding the inverse. she transformed. ✨

not me warning you that a gets overwritten — the original matrix is gone after this, bestie, it's been replaced by its inverse. if you needed the original, copy it first fr fr 😭

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✨ SEE ALSO ✨

• lis(3)
• http://www.ssisc.org/lis/

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and that's the whole page, bestie!! 💖✨🦋🌸💅

cute lil sign-off: this gem came from the Lis Library Functions manual, dated 3 Dec 2014, and she lives under the page name lis_array_ge(3f). slay, go invert something. 👑🎀