### The Equivalence Between Numbers and Leftins

*Z*^{+} *L*_{Z+}

*Z *^{-} *L*_{Z-}

*Z* *L*_{Z}

Thus the integers can be considered a subset of the leftins.
*Z* *L*.

*L*_{r} *Q*.

The rational numbers have a 1-to-1 mapping with the rational leftins.

*I* *L*_{f}
.

*I* *L*_{f} .

*C* *L*_{f}
.

*C* *L*_{f} .

Some irrational and complex numbers are present in *L*_{f}
but not all.

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© Scott Sherman 1999