Or Simplex Step-by-Step Solver

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📘 OR Simplex Step-by-Step — the most complete Operations Research solver on Android. Built and validated with professors at Kyiv Polytechnic University, used by thousands of students worldwide.

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🧮 EVERY METHOD YOU NEED
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🔢 Simplex Method — classical, Two-Phase, and Big-M
🎯 Integer programming — Branch & Bound
📈 2D graphical method — feasible region, objective line, optimum
🧊 NEW: 3D polytope visualization for 3-variable LP — rotate and explore the feasible region
🔍 Sensitivity & Post-Optimal Analysis — ranges, shadow prices, RHS intervals
🚛 Transportation Problem — North-West Corner, Least-Cost, Vogel's Approximation (VAM)
🔄 MODI / U-V Method — optimality test and refinement
✅ Assignment Problem — Hungarian Algorithm
⏱️ Job Sequencing — 2, 3, and N-machine using Johnson's Algorithm

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⭐ WHY STUDENTS CHOOSE IT
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📝 Step-by-step explanations — every iteration commented in plain language
➗ Exact fraction arithmetic — no rounding errors, ever
⌨️ Dedicated math keyboard — built for fractions, signs, and decimals
📂 Problem history — save, reopen, and edit past problems
🌍 8 languages — English, Español, Français, Português, Русский, Українська, العربية, فارسی
⛔ 100% offline — no account, no internet, no tracking of your work