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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

• CommentRowNumber1.
• CommentAuthorDmitri Pavlov
• CommentTimeJul 17th 2022

Deleted this: vanishes (or at heast has non-maximal rank).

Added this: has rank strictly less than the dimension of $Y$.

• CommentRowNumber2.
• CommentAuthorDmitri Pavlov
• CommentTimeJul 17th 2022

The $f$-image of a critical point is known as a critical value. A point in $Y$ that is not a critical value is known as a regular value.