lis_solver...esidualnorm(3f)

✨ NAME ✨

okay so bestie, this page is from the Lis Library Functions manual, and the function is lis_solver_get_residualnorm — and what it does is calculate the relative residual norm from the solution. That's the whole assignment. 💅

🌸 SYNOPSIS 🌸

subroutine lis_solver_get_residualnorm(LIS_SOLVER solver, LIS_INTEGER
*residual, LIS_INTEGER ierr);

💖 DESCRIPTION 💖

Calculate the relative residual norm ||b - Ax||_2/||b||_2 from the solution x. That's it. That's the vibe. ✨

🎀 INPUT 🎀

• solver — The solver. Like, the solver object doing the solver things. 🫶

🦋 OUTPUT 🦋

• residual — The relative residual norm ||b - Ax||_2/||b||_2. That's the number you're getting back. 👑

🌈 SEE ALSO 🌈

• lis(3)
• http://www.ssisc.org/lis/

and that's the whole page, bestie — from the Lis Library Functions manual, Man Page dated 6 Sep 2012, page lis_solver...esidualnorm(3f). bye bye, slay responsibly 💖🎀