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We have just started logging errors. On this page, you will find information about all errors that persisted on the site for more than one month on any page. Note: This applies only to errors that were not fixed by December 18, 2011. Errors fixed before then are not being logged on this page.
|Page||Error description||Version where it was introduced||Version where it was corrected||Why error? Why not caught? ("I" refers to Vipul)|
|second derivative test||Didn't state that the point of concern must be a critical point in the "What the test states" section though it was stated in the "What the test is for" section||September 19, 2011||May 2, 2012||didn't review/revisit page often enough|
|point of local extremum implies critical point||Fact numbers in the Explanation column for the local minimum case were somewhat messed up (although fact numbers in the Facts used column were correct)||October 20, 2011||April 25, 2012 (onte that the error was fixed along with many other changes to the page structure)||copy-paste error from maximum to minimum|
|first derivative test||had "right" in place of "left" for one of the case rows||September 19, 2011||April 24, 2012||didn't review, revisit page|
|product rule for partial differentiation||directional derivative instead of gradient at one place, and a bunch of minor typos, missing open parenthesis, use of for function product at one place (might confuse with dot product), and extraneous statements like "let be a unit vector" in definition components where no unit vector was needed.||April 2, 2012||didn't revisit page often enough|
|partial derivative||Had "x" in place of "y" in one of the derivative descriptions/definitions.||December 17, 2011||April 1, 2012||Didn't revisit page often enough|