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:

j,kinteger-valued arithmetic expressionm,nnonnegative integer-valued arithmetic expressionx,yreal-valued arithmetic expressionzcomplex-valued arithmetic expressionfreal-valued or complex-valued functionS,Tset or multiset

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 ...