By definition, a number that's infinitesimal is close to, but greater than, this
But zero is surrounded by a ... 
the Figure 1.4.3, there are positive infinite numbers, which are larger than any... [DOC] [TLE] The Calculus of Infinitesimals - San Jose State University [PAR] Those terms for the ratio that which had an infinitesimal as a factor were ... 
Another example of a field is the real numbers R with the usual definition of .... 
which is greater than any real number but not equal to infinity, a sort of infinitude.