- Fomalhaut (stars.astro.illinois.edu)
FOMALHAUT (Alpha Piscis Austrinus). This wonderful first magnitude (1.16, ranking 18th) star of northern-hemisphere autumn, usually pronounced “fo-ma-low,” slides slowly in lonely grandeur above the southern horizon (as seen from the north) during the months of October and November.
- Summation (Wikipedia)
In mathematics, summation is the addition of a sequence of numbers, called addends or summands; the result is their sum or total. Beside numbers, other types of values can be summed as well: functions, vectors, matrices, polynomials and, in general, elements of any type of mathematical objects on which an operation denoted “+” is defined.