There are some mathematical concepts for which different authors use different definitions. For example, some authors count zero as a [[natural number]] while others do not. These differences can affect the way that mathematical theorems are stated. Therefore, double-check the definitions in each article to see whether they match those to which you are accustomed.
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==Ways to use Wikipedia==
The main way to use Wikipedia is to search for an article on a topic that interests you. Follow the wikilinks to articles that explain any terms you don't understand or want to explore further. In addition:
*A well-written Wikipedia article will cite references, which you can use to expand your knowledge further and check that the Wikipedia article is correct.
*Talk pages (the "Discussion" tab at the top of article pages) are the best way to raise queries about the content of a particular article.
*The [[Wikipedia:Reference desk/Mathematics|mathematics reference desk]] is useful if you have a question and don't know where to look up the answer.
*Explore the [[:Category:Mathematics|category system]].
*The [[Portal:Mathematics|mathematics portal]] is a good "way in" to mathematics articles on Wikipedia.
If you are in doubt, ask at the [[Wikipedia:Reference desk/Mathematics|mathematics reference desk]]. No one on Wikipedia is going to [[Wikipedia:Do your own homework|do your math homework]] for you, but if you ask the right question they might point you to some information that will enable you to do it for yourself.
