[see also: illustration, exemplify
To see an example, set......
As an example, let......
Here is an example of......
An explicit example is two planes through the origin.
This can obviously happen for some X; examples are c0 and l1.
We can make this clear with the following example.
The simplest example of this is furnished by......
We now describe a more interesting example featuring an operator that is non-trivially supercyclic.
It is easy to see, by means of an example, that......
Show by example that a P-system need not be a field.
Examples are given to show that......
Examples abound in which P is discontinuous.