In order that a mathematical science of any importance may be founded upon conventional definitions, the entities created by them must have properties which bear some affinity to the properties of existing things.


A Treatise on Universal Algebra, with Applications, Preface (p. vii), Hafner Publishing Company. 1960


In order that a mathematical science of any importance may be founded upon conventional definitions, the entities created by them must have...

In order that a mathematical science of any importance may be founded upon conventional definitions, the entities created by them must have...

In order that a mathematical science of any importance may be founded upon conventional definitions, the entities created by them must have...

In order that a mathematical science of any importance may be founded upon conventional definitions, the entities created by them must have...