Updated FEATURES.md

ERGO-Code · Jan 13, 2025 · f3664d9 · f3664d9
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@@ -17,3 +17,5 @@ Fixed bug in presolve when pointers stored in HighsMatrixSlice get invalidated w
 Primal and dual residual tolerances - applied following IPM or PDLP solution - now documented as options
 
 Highs::getCols (Highs::getRows) now runs in linear time if the internal constraint matrix is stored column-wise (row-wise). Added ensureColwise/Rowwise to the Highs class, the C API and highspy so that users can set the internal constraint matrix storage orientation
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+When columns and rows are deleted from the incumbent LP after a basic solution has been found, HiGHS no longer invalidates the basis. Now it maintains the basic and nonbasic status of the remaining variables and constraints. When the model is re-solved, this information is used to construct a starting basis.