In Mathematics
The number 13 is the sixth prime number, and the smallest emirp (prime which is a different prime when reversed). It is also a Fibonacci number, a happy number, and one of only 3 known Wilson primes.
Since 52 + 122 = 132, (5, 12, 13) forms a Pythagorean triple.
There are 13 Archimedean solids, and a standard torus can be sliced into 13 pieces with just 3 plane cuts.
Read more about this topic: 13 (number)
Famous quotes containing the word mathematics:
“Why does man freeze to death trying to reach the North Pole? Why does man drive himself to suffer the steam and heat of the Amazon? Why does he stagger his mind with the mathematics of the sky? Once the question mark has arisen in the human brain the answer must be found, if it takes a hundred years. A thousand years.”
—Walter Reisch (1903–1963)
“Mathematics alone make us feel the limits of our intelligence. For we can always suppose in the case of an experiment that it is inexplicable because we don’t happen to have all the data. In mathematics we have all the data ... and yet we don’t understand. We always come back to the contemplation of our human wretchedness. What force is in relation to our will, the impenetrable opacity of mathematics is in relation to our intelligence.”
—Simone Weil (1909–1943)