Is there a simple example of an isometry between normed vector spaces that is not an affine map?
Example of a non-linear isometry?
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linear-algebra
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10How about translation? – 2011-08-24
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3@Q Translations are [affine](http://en.wikipedia.org/wiki/Affine_transformation) by definition. – 2011-08-24
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1@whuber : They are (generally) not linear, which is what the question was asking when QY commented. – 2011-08-24
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0@Ricky Thanks. The translation comment makes perfect sense in light of the original version. – 2011-08-24
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2@Name: This string of comments shows why it's a good idea to mark your edits when you change the content of the question. – 2011-08-24