A Stamp Collector Wants to Include in Her Collection Exactly $I$

question 7

Short Answer

A stamp collector wants to include in her collection exactly one stamp from each country of Africa. If $I$ (s) means that she has stamp $s$ in her collection, $F ( s , c )$ means that stamp $s$ was issued by country $c$ , the domain for $s$ is all stamps, and the domain for $c$ is all countries of Africa, express the statement that her collection satisfies her requirement. Do not use the $\exists$ ! symbol.

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Definitions:

Analytics

The systematic computational analysis of data or statistics.

Aggregating

The process of combining multiple pieces of data together to form a summary or a whole.

Counting Commands

The act of tallying or enumerating specific instructions given to a computer or device to perform operations.

Exabytes

A unit of information or computer storage equal to one quintillion bytes or approximately a billion gigabytes.