ehm, sorry, i am a beginner in set theory. learning on my own.(adsbygoogle = window.adsbygoogle || []).push({});

for cartesian product ordered pair, for example

[itex] A = \{a_1, a_{2}, a_{3}\} \\

B = \{b_{1}, b_{2}, b_{3}\} [/itex]

is the product [itex] A \times B = \{a_{1}b{1}, a_{1}b{2}, a_{1}b{3}, a_{2}b{1}, \\

a_{2}b{2}, a_{2}b{3}, a_{3}b{1}, a_{3}b{2}, a_{3}b{3},\} [/itex] ??

What does [itex] A \times B = \{(a,b)\mid a \in A and b \in B\} [/itex] mean in detail?

thanks.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Simple question, please help

Loading...

Similar Threads - Simple question please | Date |
---|---|

I A simple question about probability theory | Aug 2, 2017 |

B A simple (?) combinatorics question... | Aug 28, 2016 |

Simple probability question | Apr 15, 2015 |

Simple question about sets in statistics | Jan 20, 2015 |

Simple probability question Please help? | Dec 10, 2011 |

**Physics Forums - The Fusion of Science and Community**