rho

Rho may refer to:

• Rho (letter), a letter of the Greek alphabet, upper case Ρ, lower case ρ

Symbols

in mathematics

• Spectral radius in a spherical coordinate system

in physics

• Density of a material
• Volume charge density
• Resistivity of a material
• Rho meson, ρ ⁺ , ρ⁰, ρ ⁻

in chemistry

• The reaction constant in the Hammett equation

in biology

• Rho factor protein in RNA transcription termination
• Rho family of GTPases, small GTPase enzymes important in migration and stress fibre formation
• Subjective night, the inactivity period of a Circadian rhythm
• Ecology, population damping ratio where ρ = λ1 / |λ2|.

in economics

• Rho (finance), in Quantitative Finance, a first order derivative of an option pricing formula versus the rate of a risk-free investment.

in statistics

• Spearman's rank correlation coefficient, a non-parametric measure of correlation
• Pearson product-moment correlation coefficient, a common measure of the correlation between two variables

Places

• Rho (Italy), a town near Milan, Italy (not to be confused with Ro, Italy)
• Rho Island, a small Greek island near Kastellorizo
• Rho River, a tributary of the Dora di Bardonecchia
• Rhodes International Airport, "Diagoras", a Greek airport whose IATA code is RHO

Other

• Giacomo Rho, Italian Jesuit missionary
• Right-Hand Opponent (RHO), in Contract Bridge
• Rho Cassiopeiae, a yellow hypergiant in the constellation Cassiopeia
• Red Hot Organization, a charity organization dedicated to raising awareness of HIV/AIDS
• Pollard's rho algorithm, an integer factorization algorithm, effective for finding small factors
• Pollard's rho algorithm for logarithms, an algorithm for solving the discrete logarithm problem

See also

• Ro (disambiguation)

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