SOPLEX(1)

✨ soplex — solve linear programming problems ✨

okay bestie, gather round, because this is soplex from section 1 of the manual, and she is that girl. 💅 She solves linear programming problems. That's the whole vibe. No cap. 🦋

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🌸 NAME 🌸

soplex — solve linear programming problems 💖

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🎀 SYNOPSIS 🎀

soplex [options] lpfile

like. you give her a file, you give her some flags, she goes off. main character energy fr fr. 👑

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✨ OPTIONS ✨

🍓 the file itself

• lpfile — your linear program, bestie! she takes it as a .mps[.gz] or .lp[.gz] file. yes the .gz means you can hand her a zipped one, she's flexible like that. 💜

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🌈 General options

• --readbas=basfile — read your starting basis in from a file. head start, we love to see it. ✨
• --writebas=basfile — write the terminal basis out to a file. save it for later, bestie, you never know. 💾
• --writefile=lpfile — write the LP to a file. it lands in LP or MPS format depending on the extension you give it. she just knows. 🔥
• --writedual=lpfile — same deal but for the dual LP, written out in LP or MPS format depending on the extension. 👯
• --type:name=val — change a parameter value, using the same syntax as settings file entries. sneaky little inline tweak. 🙈
• --loadset=setfile — load your parameters from a settings file. heads up though: command line parameters overrule this, so CLI wins, always. periodt. ⚠️
• --saveset=setfile — save parameters to a settings file. 🎀
• --diffset=setfile — save only the modified parameters to a settings file. minimal, curated, very demure. 💅
• --extsol=value — hand her an external solution to use for validation. proofread my work bestie. 🫶

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🧚 Limits and tolerances

• -ts — set the time limit to s seconds. clock's ticking babe. ⏰
• -in — set the iteration limit to n. 🌀
• -feps — set the primal feasibility tolerance to eps. 🌸
• -oeps — set the dual feasibility (optimality) tolerance to eps. ✨
• -leps — set the validation tolerance to eps. 🦋

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👑 Algorithmic settings

okay so default settings are marked with * — that's the "she picked this one for you" star. ⭐

• --readmode=value — choose the reading mode for lpfile: 0* is floating point, 1 is rational. 🧠
• --solvemode=value — choose the solving mode: 0 is a floating-point solve, 1* is auto, 2 forces iterative refinement. 🌈
• --arithmetic=value — choose the base arithmetic type: 0 is double, 1 is quadprecision, 2 is higher multiprecision. big brain hours. 🧮
• --precision=value — choose the precision for a multiprecision solve. ⚠️ only active when arithmetic=2, and the possible values are 50, 100, and 200. no other numbers, bestie, don't try it. 🙈
• -svalue — choose the simplifier/presolver: 0 is off, 1* is internal. 💜
• -gvalue — choose the scaling: 0 off, 1 uni-equilibrium, 2* bi-equilibrium, 3 geometric, 4 iterated geometrix, 5 least squares, 6 geometric-equilibrium. six whole flavours. 🍓
• -pvalue — choose the pricing: 0* auto, 1 dantzig, 2 parmult, 3 devex, 4 quicksteep, 5 steep. 👑
• -rvalue — choose the ratio tester: 0 textbook, 1 harris, 2 fast, 3* boundflipping. 🎀

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💅 Display options

• -vlevel — set verbosity to level: 0 is error, 3 is normal, 5 is high. 🗣️
• -x — print the primal solution. ✨
• -y — print the dual multipliers. 💖
• -X — print the primal solution in rational numbers. fancy fr. 🧚
• -Y — print the dual multipliers in rational numbers. 💜
• -q — display detailed statistics. she loves a spreadsheet moment. 📊
• -c — perform a final check of the optimal solution in the original problem. double-check queen. ✅

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lowkey remember: option names are exact, case-sensitive, and the * ones are the defaults she already chose for you. don't come for me if you typo -X as -x, they are different girls. 😭

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and that's the whole page, bestie!! 💖 this was soplex, version 6.0, section 1 of the manual — go forth and optimize, you absolute icon, mwah 🫶🌸✨