- _I: the set of integers
- _I2: the set of 2D vectors of integers
- _I3: the set of 3D vectors of integers
- _I4: the set of 4D vectors of integers
- _In: the set of nD vectors of integers; has a parameter n
- _I22: the set of matrices of integers
- _I33: the set of matrices of integers
- _I44: the set of matrices of integers
- _Inn: the set of matrices of integers
; has a parameter n
- _I21: the set of 2D column vectors of integers
- _I31: the set of 3D column vectors of integers
- _I41: the set of 4D column vectors of integers
- _In1: the set of nD column vectors of integers; has a parameter
n
- _I12: the set of 2D row vectors of integers
- _I13: the set of 3D row vectors of integers
- _I14: the set of 4D row vectors of integers
- _I1n: the set of nD row vectors of integers; has a parameter
n
- _Imn: the set of matrices of integers; has two parameters
m and n
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2009-12-22