Greek
Β — Beta function
Γ — Angular momentum, Gamma function, Christoffel symbols
Δ — A macroscopic change in the value of a variable, Laplace operator, Delta particle
Θ — Heaviside step function
Λ — Iwasawa algebra, Lorentz transformation, Lambda Hyperon
Ξ — Cascade Hyperon
Π — Product
Σ — Sum, Surface, Sigma Hyperon
Φ — Alternative symbol for Quantum mechanical wavefunction
Ψ — Quantum mechanical wavefunction
Ω — Chaitin's constant, Ohm, Solid angle, Omega Hyperon
Read more about this topic: List Of Letters Used In Mathematics And Science
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“Indeed, there is hardly the professor in our colleges, who, if he has mastered the difficulties of the language, has proportionally mastered the difficulties of the language, has proportionally mastered the difficulties of the wit and poetry of a Greek poet, and has any sympathy to impart to the alert and heroic reader.”
—Henry David Thoreau (1817–1862)
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—Thomas Mann (1875–1955)
“He degraded himself by the vice of drinking, which, together with a great stock of Greek and Latin, he brought away with him from Oxford and retained and practised ever afterwards.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)