The Art of Computer Programming, Volume 2: Seminumerical Algorithms, 3rd Edition

Appendix B. Index to Notations

In the following formulas, letters that are not further qualified have the following significance:

$\begin{array}{cc}\hfill j,k& \text{integer-valued arithmetic expression}\hfill \\ \hfill m,n& \text{nonnegative integer-valued arithmetic expression}\hfill \\ \hfill x,y& \text{real-valued arithmetic expression}\hfill \\ \hfill z& \text{complex-valued arithmetic expression}\hfill \\ \hfill f& \text{real-valued or complex-valued function}\hfill \\ \hfill S,T& \text{set or multiset}\hfill \end{array}$

Formal symbolism	Meaning	Where defined
	end of algorithm, program, or proof	§1.1
An or A[n]	the nth element of linear array A	§1.1
Amn or A[m, n]	the element in row m and column n of rectangular array A	§1.1
V ← E	give variable V the value of expression E	§1.1
U ↔ V	interchange the values ...