Digital Library of Mathematical Functions
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NIST
Notations

Notations I

*ABCDEFGH♦I♦JKLMNOPQRSTUVWXYZ
I
unit matrix; Common Notations and Definitions
Iα
fractional integral; (1.15.47)
Iα
fractional integral; (2.6.33)
I(m)
general elliptic integral; 19.29(ii)
imaginary part; (1.9.2)
Iν(z)
modified Bessel function; (10.25.2)
I~ν(x)
modified Bessel function of imaginary order; (10.45.2)
in(1)(z)
modified spherical Bessel function; (10.47.7)
in(2)(z)
modified spherical Bessel function; (10.47.8)
Ix(a,b)
incomplete beta function; (8.17.2)
I(a,b,x)=Ix(a,b)
notation used by Magnus et al. (1966); 8.1
(with Ix(a,b): incomplete beta function)
idem(χ1;χ2,,χn)
idem function; 17.1
Ien(z,h)
modified Mathieu function; (28.20.17)
inerfc(z)
repeated integrals of the complementary error function; (7.18.2)
inn(z,q)=fen(z,q)
notation used by Campbell (1955); 28.1
(with fen(z,q): second solution, Mathieu’s equation)
inf
greatest lower bound (infimum); Common Notations and Definitions
inhn(z,q)=Fen(z,q)
notation used by Campbell (1955); 28.1
(with Fen(z,q): modified Mathieu function)
inv
inversion number; 26.14(i)
inverfx
inverse error function; (7.17.1)
inverfcx
inverse complementary error function; (7.17.1)
Ion(z,h)
modified Mathieu function; (28.20.18)