User talk:132.162.85.98

September 2019
Please refrain from making unconstructive edits to Wikipedia, as you did at Maxima and minima. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. Andrew Base (talk) 13:35, 4 September 2019 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

The statement in the made in the article is false. There is an obvious counterexample in the article on Fermat's theorem (stationary points), this is verifiable.