Replying to Dick Palais: Any edit to Wikipedia no matter how small is good, even if it's just correcting a typo. One thing I've done is to make a small edit to every page I visit. There is always something to be fixed. Once you've done a number of small edits you can do something more substantial. The mathematics reference desk is quite similar to MathOverflow and could be a good place to get started: http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Mathematics.

Replying to Marc Palm: It is quite easy to see who made edits to a page, just click on the history tab. A user's contributions can be seen by going to a user's page and selecting user contributions on the left.

Replying to Dick Palais: Any edit to Wikipedia, no matter how small, is good even if it's just correcting a typo. One thing I've done is to make a small edit to every page I visit. There is always something to be fixed. Once you've done a number of small edits, you can do something more substantial. The mathematics reference desk is quite similar to MathOverflow and could be a good place to get started: http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Mathematics.

Replying to Marc Palm: It is quite easy to see who made edits to a page, just clicking on the history tab. A user's contributions can be seen by going to a user's page and selecting user contributions on the left.

Replying to Dick Palais, any edit to wikipedia no matter now small is good, even if its just correcting a typo. One thing I've done is make a small edit to every page I visit, there is always something to be fixed. Once you've done a number of small edits you can do something more substantial. The mathematics reference desk is quite similar to MathOverflow and could be a good place to get started http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Mathematics

Replying to Marc Palm, it is quite easy to see who make edits to a page, just click on the history tab. A users contributions can be seen by going to a users page and selecting user contributions on the left.

Replying to Dick Palais: Any edit to Wikipedia no matter how small is good, even if it's just correcting a typo. One thing I've done is to make a small edit to every page I visit. There is always something to be fixed. Once you've done a number of small edits you can do something more substantial. The mathematics reference desk is quite similar to MathOverflow and could be a good place to get started: http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Mathematics.

Replying to Marc Palm: It is quite easy to see who made edits to a page, just click on the history tab. A user's contributions can be seen by going to a user's page and selecting user contributions on the left.