Algorithm equivalence table

A table comparing the algorithm details of commonly named algorithms.

Common Name	Batch size	Search direction	Step method	Objective	Problem type
ePIE	1				ptychography
Difference Map					ptychography
LSQ-ML	any	steepest descent	least squares	maximum likelihood	ptychography
cgrad	full	conjugate gradients	line search	maximum likelihood	any
SGD	any	steepest descent	fixed	any	any

Notes

LSQ-ML

Phase retrieval and object/probe sub-problems are solved separately in an alternating fashion.