Something that serves to illustrate or explain a rule.
Something that serves as a pattern of behaviour to be imitated (a good example) or not to be imitated (a bad example).
Something that is representative of all such things in a group.
A person punished as a warning to others.
A parallel or closely similar case, especially when serving as a precedent or model.
An instance (as a problem to be solved) serving to illustrate the rule or precept or to act as an exercise in the application of the rule.
To be illustrated or exemplified (by).
A rule that is imposed by regulations and/or socially enforced by members of a community.
if v ne 0 then |v| ne 0;
That which is normal or typical.
A high level of performance in a chess tournament, several of which are required for a player to receive a title.
A sentence with non-descriptive meaning, such as a command, permission, or prohibition.
given a scalar k, |kv|=|k|·|v|, where |k| is the absolute value of k;
given two vectors v,w, |v+w|<|v|+|w| (the triangle inequality).
To endow (a vector space, etc.) with a norm.