WeierstrassZeta[u, {g_2, g_3}] gives the Weierstrass zeta function \[Zeta](u; g_2, g_3).
WeightedAdjacencyMatrix[g] gives the adjacency matrix of edge weights of the graph g.
Which
(Built-in Mathematica Symbol) Which[test_1, value_1, test_2, value_2, ...] evaluates each of the test_i in turn, returning the value of the value_i corresponding to the first one that yields True.
While
(Built-in Mathematica Symbol) While[test, body] evaluates test, then body, repetitively, until test first fails to give True.
WhittakerW[k, m, z] gives the Whittaker function W k, m (z).
With
(Built-in Mathematica Symbol) With[{x = x_0, y = y_0, ...}, expr] specifies that in expr occurrences of the symbols x, y, ... should be replaced by x_0, y_0, ....
Xnor
(Built-in Mathematica Symbol) Xnor[e_1, e_2, ...] is the logical XNOR (not XOR) function. It gives True if an even number of the e_i are True, and the rest are False. It gives False if an odd number of ...
Xor
(Built-in Mathematica Symbol) Xor[e_1, e_2, ...] is the logical XOR (exclusive OR) function. It gives True if an odd number of the e_i are True, and the rest are False. It gives False if an even number of ...
ZernikeR[n, m, r] gives the radial Zernike polynomial R_n^m(r).
ZetaZero[k] represents the k\[Null]^th zero of the Riemann zeta function on the critical line.ZetaZero[k, t] represents the k\[Null]^th zero with imaginary part greater than ...