MonomialList[poly] gives the list of all monomials in the polynomial poly.MonomialList[poly, {x_1, x_2, ...}] gives the list of monomials with respect to the variables x_i in ...
ObservabilityGramian[ss] gives the observability Gramian of the StateSpaceModel object ss.
PolynomialMod[poly, m] gives the polynomial poly reduced modulo m. PolynomialMod[poly, {m_1, m_2, ...}] reduces modulo all of the m_i.
PolynomialQuotient[p, q, x] gives the quotient of p and q, treated as polynomials in x, with any remainder dropped.
Scale
(Built-in Mathematica Symbol) Scale[g, s] represents graphics primitives g scaled by a factor s. Scale[g, s, {x, y, ...}] scales with the point {x, y, ...} kept fixed. Scale[g, {s_x, s_y, ...}, ...] ...
SixJSymbol[{j_1, j_2, j_3}, {j_4, j_5, j_6}] gives the values of the Racah 6-j symbol.
Specularity[s] is a graphics directive which specifies that surfaces of 3D graphics objects which follow are to be taken to have specularity s. Specularity[s, n] uses ...
StringCount["string", " sub"] gives a count of the number of times " sub" appears as a substring of " string". StringCount["string", patt] gives the number of substrings in " ...
f /: lhs := rhs assigns rhs to be the delayed value of lhs, and associates the assignment with the symbol f.
ToNumberField[a, \[Theta]] expresses the algebraic number a in the number field generated by \[Theta]. ToNumberField[{a_1, a_2, ...}, \[Theta]] expresses the a_i in the field ...