I spend less time waiting for Excel to do a recalculation of my formulas today than I did on my 386 in the 1990s, even though my spreadsheets are thousands of times more complex.
For Newton-Raphson calculations, the inverse Hessian is output after each exact recalculation, but not after updating.
(A later recalculation gave 57,033 toises =121,569 yds., after the application of some corrections to the measures indicated by himself.) Snell also distinguished himself as a mathematician, and discovered the law of refraction, in 1621 (see Light).
When a financial change occurs, it may be necessary to reconvene with the paying ex-spouse or meet with a judge for recalculation.