SimilarityRules is an option for functions such as SequenceAlignment that gives a list of rules for similarity scores to assume between pairs of elements.

SphericalHankelH1[n, z] gives the spherical Hankel function of the first kind h_n^(1)(z).

A Bernoulli equation is a first-order equation of the form The problem of solving equations of this type was posed by James Bernoulli in 1695. A year later, in 1696, G. ...

Relational operators. This tests whether 10 is less than 7. The result is False. Not all of these numbers are unequal, so this gives False.

InverseGammaDistribution[\[Alpha], \[Beta]] represents an inverse gamma distribution with shape parameter \[Alpha] and scale parameter ...

ReduceElement[e] gives a field element in reduced form.

Exa is the SI unit prefix denoting 10^18.

ComplexExpand[expr] expands expr assuming that all variables are real. ComplexExpand[expr, {x_1, x_2, ...}] expands expr assuming that variables matching any of the x_i are ...

CoshIntegral[z] gives the hyperbolic cosine integral Chi(z).

ExponentStep is an option for NumberForm and related functions that determines in what steps exponents are taken to increase when scientific notation is used.