It is a valid value for the Strategy Option for inverseOfMap (and other functions). By choosing Strategy=>ReesStrategy, the equation of the ideal of definition of the Rees algebra are generated by the known elimination technique. E.g. Vasconcelos, Rees algebras, multiplicities, algorithms. Springer Monographs in Mathematics. Springer-Verlag, Berlin, 2005.

- SaturationStrategy -- A strategy for inverseOfMap, isBirationalMap, isEmbedding.
- SimisStrategy -- A strategy for inverseOfMap, isBirationalMap and isEmbedding.
- HybridStrategy -- A strategy for inverseOfMap, isBirationalMap and isEmbedding.

The object ReesStrategy is a symbol.