Math symbols for equations

Plain-text math notation — in tweets, code comments, README equations — depends on a small core of Unicode operators: the comparators ≤ ≥ ≠ ≈, set marks ∈ ∉ ⊂ ⊆, the calculus trio ∑ ∫ ∂, and the infinity ∞. Together they cover most working-mathematician shorthand without dragging in a LaTeX renderer.

Greek letters earn their place too: π, θ, λ and Σ appear constantly in formulas. Unicode encodes them as full letters (not just "math symbols"), so they read correctly to screen readers — important if your equation lives in a paragraph rather than a math-mode block.