Function usolve #

Solves the linear equation system by backward substitution. Matrix must be an upper triangular matrix.

U * x = b

Syntax #

math.usolve(U, b)

Parameters #

Parameter Type Description
U Matrix, Array A N x N matrix or array (U)
b Matrix, Array A column vector with the b values

Returns #

Type Description
DenseMatrix | Array A column vector with the linear system solution (x)

Examples #

const a = [[-2, 3], [2, 1]]
const b = [11, 9]
const x = usolve(a, b)  // [[8], [9]]

See also #

lup, slu, usolve, lusolve

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