Alpha

1. Alpha In Science In Mathematics • Often represents angles in algebra. • In statistics, the significance level when a Normal Distribution is used. • Alpha Radiation • Angular acceleration • In Zoology, used to name dominant individual in wolf or dog pack.

2. Beta In Science • Beta Radiation

3. Gamma In Mathematics In Science • Chromatic Number of a graph. • is the Gamma Function. It allows the factorial function to be extended to real/negative/complex numbers. • In statistics, the distribution is the conceptual opposite of the Multinomial. • In Computer Science, the tape alphabet of a Turing Machine. • Gamma Radiation in nuclear physics. • Heat Capacity Ratio in thermodynamics. • Surface Energy in materials science.

4. Epsilon In Science In Mathematics • is an arbitrarily small positive constant. • means “is an element of” in Set Theory. • In Computer Science, denotes an empty string. • In statistics, to refer to error terms. • refers to elasticity in Economics. • Electromotive force. • In Astronomy, the 5th biggest star in a constellation.

5. Zeta In Mathematics In Science • is the Riemann Zeta Function. • The damping ratio of an oscillating system. • Effective nuclear charge on an electron.

6. Eta In Mathematics In Science • is the Dirichlet Eta Function in number theory. • -mesons in particle physics. • The efficiency of a power supply. • In Oceonography, the measurement of sea-level height above the mean in that location.

7. Theta In Mathematics In Science • is often used to denote an angle. • In probability, often denotes the likelihood function (i.e. ). • One of the Chebyshev Functions in Prime Number Theory. • In Computer Science, “Big Theta” puts a bound on the complexity of an algorithm. • The potential temperature in Meteorology. • In neuroscience, Brain Signal Frequency ranging from 4-8Hz.

8. Iota In Mathematics • Can be used as the value of , but a regular ‘’ is more typically used.

9. Kappa In Mathematics In Science • In graph theory, is the minimum number of edges that need to be removed from a graph to make it ‘disconnected’. • A measurement of ‘inter-rater reliability’ in surveys, i.e. how consistent people’s responses were. • In Chemistry, the compressibility of a compound.

10. Lambda In Mathematics In Science • Sometimes used to mean the ‘empty set’ in Set Theory, although more often used. • In lambda calculus represents a nameless function, e.g. means • An eigenvalue of a matrix. • is a set of logical axioms in First Order Logic. • The wavelength of any wave. • is the half life of a radioactive material.

11. Mu In Mathematics In Science • indicates the mean in a Normal Distribution. • The population mean. • The Mobius Function in number theory. • The Integrating Factor in differential equations. • The coefficient of friction in mechanics. • The elementary particles called the muon and antimuon. • The chemical potential of a system in thermodynamics.

12. Nu In Mathematics In Science • is the degree of freedom in statistics. • is the frequency of a wave. • is the number of neutrons released per fission. • Any of the three kinds of neutrino in particle physics.

13. Xi In Mathematics In Science • Eigenvectors. • The ‘universal set’ in set theory. • Often used to denote random variables in statistics. • The correlation function in astronomy. • Potential difference in Physics (in Volts).

14. Omicron In Mathematics In Science • Originally used in ‘Big O’ notation, which describes how a function asymptotically grows, although a normal ‘O’ is preferred. • The 13th biggest star in a constellation group.

15. Pi In Mathematics • The ratio between the diameter and circumference of a circle. • is the product of expressions, e.g. • The ‘prime counting function’ is the number of primes numbers up to a given integer .

16. Rho In Mathematics In Science • Various densities (e.g. ) • A plastic number (a unique real solution to ) • is the spectral radius of a matrix. • Spearman’s Rank Correlation Coefficient in statistics. • indicates resistivity. • In molecular biology, the Rho Protein responsible for the termination of RNA synthesis.

17. Sigma In Mathematics In Science • is the population standard deviation in statistics, or the standard deviation of a Normal Distribution. • is used to sum expressions.E.g. • The covariance matrix in statistics. • finds the sum of the factors of , e.g. • -receptor in biology. • used for surface tension. • -bonds in chemistry. • A measure of electrical conductivity.

18. Tau In Mathematics In Science • is twice as big as . • Torsion of a curve in differential geometry. • The tau function in number theory. • Often used in Physics as a time variable (particularly if is already being used for temperature). • Torque, the rotational force in mechanics. • Tau Protein associated with diseases such as Alzheimer’s.

19. Upsilon In Science • is the Upsilon Particle in particle physics.

20. Phi In Mathematics In Science • is the Golden Ratio. • is the Probability Density Function for the Normal Distribution. • A sentence in First Order Logic. • is Euler’s Totient Function. It gives the number of values up to where the greatest common divisor of that number and is 1. e.g.:, because and • The aromatic functional group in organic chemistry. • Porosity in geology.

21. Chi In Mathematics In Science • The (“Chi Squared”) distribution in statistics, frequently used in hypothesis testing. • In topology, the Euler characteristic of a surface. • In chemistry, the mole fraction and electronegativity. • The optic chiasm in neurology (due to its shape resembling the letter)

22. Psi In Mathematics In Science • The sum of the reciprocals of the Fibonacci numbers: • The Polygamma Function. • Used to represent wave functions in quantum mechanics. • Water Potential in movement of water between plant cells. • The-meson in particle physics. • In astronomy, the planet Neptune.

23. Omega In Mathematics In Science • In statistics, used to indicate the sample space, i.e. the set of possible outcomes. • is the Omega Constant, a solution of the Lambert-W function. • The omega subgroups in group theory. • are the complex cube roots of 1. • is the number of distinct factors of . e.g. • is the unit of electrical resistance. • -baryons in particle physics. • is angular velocity. • is the ranking of a star’s brightness within a constellation.