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_compute_cost_div_m(m, p, norm_info)

This is equation (3.10). It measures cost in terms of the number of required matrix products.

Parameters

m : int

A valid key of _theta.

p : int

A matrix power.

norm_info : LazyOperatorNormInfo

Information about 1-norms of related operators.

Returns

cost_div_m : int

Required number of matrix products divided by m.

A helper function for computing bounds.

Examples

See :

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GitHub : /scipy/sparse/linalg/_expm_multiply.py#376
type: <class 'function'>
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