I have actually the following proposal. There is an entry in encyclopedia called "Hausdorff". Since this entry is just linked to a T2 space, I think it reasonable to rename it to "Hausdorff space".
If you type in the Google the following searchs, you'll get the corresponding amount of links, which can be seen as some indication of how frequently they are used:
"T2 space" - 567
"Hausdorff topological space" - 1.710
"Hausdorff space" - 11.600
So, imagine someone find the notion "Hausdorff space" in some article. He goes to PlanetMath, and find no entry for "Hausdorff space". Of cource if he is determined enough, he could look through every entry with the name Hausdorff and finally finds what he needs, but it is better to have a direct link with name "Hausdorff space".
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