Republic of Mathematics blog

Archive for November 2010

The moving pointer and 0.999…. A useful cognitive root

Posted by: Gary Ernest Davis on: November 1, 2010

Debates arise periodically as to whether 0.999… is equal to 1.  Here, the the 9’s never end in the expression “0.999…” . To paraphrase at least one U.S. President, the answer depends on what we mean by “equal”. Equality Equality takes some explaining in a mathematical setting. As an example that is familiar to almost […]