# condskeel

condskeel(M, [x, p])

$$\kappa_S(M, p) & = \left\Vert \left\vert M \right\vert \left\vert M^{-1} \right\vert \right\Vert_p \ \kappa_S(M, x, p) & = \left\Vert \left\vert M \right\vert \left\vert M^{-1} \right\vert \left\vert x \right\vert \right\Vert_p$$

Skeel condition number $\kappa_S$ of the matrix `M`

, optionally with respect to
the vector `x`

, as computed using the operator `p`

-norm. `p`

is `Inf`

by
default, if not provided. Valid values for `p`

are `1`

, `2`

, or `Inf`

.

This quantity is also known in the literature as the Bauer condition number, relative condition number, or componentwise relative condition number.

## Examples

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