Difference between revisions of "Entire function"
Jump to navigation
Jump to search
m (additional copy editing (math tags formatiting - I may return to this to expand the article)) |
DavidB4-bot (talk | contribs) m (→top: re-categorisation) |
||
| (3 intermediate revisions by 3 users not shown) | |||
| Line 2: | Line 2: | ||
The main result governing the behavior of entire functions is Liouville's theorem, which states that a bounded entire function is constant. Here an entire function <math>f \ </math> is said to be bounded if there exists a constant <math>M \ </math> such that for all <math>z \in \mathbb{C} \ </math> the bound <math>f(z)<M \ </math> holds. Liouville's theorem yields a simple proof of the fundamental theorem of algebra: if <math>p(z) \ </math> were a polynomial with no roots in the complex plane, then one can prove that <math>1/p(z) \ </math> would be a bounded entire function, and thus constant. | The main result governing the behavior of entire functions is Liouville's theorem, which states that a bounded entire function is constant. Here an entire function <math>f \ </math> is said to be bounded if there exists a constant <math>M \ </math> such that for all <math>z \in \mathbb{C} \ </math> the bound <math>f(z)<M \ </math> holds. Liouville's theorem yields a simple proof of the fundamental theorem of algebra: if <math>p(z) \ </math> were a polynomial with no roots in the complex plane, then one can prove that <math>1/p(z) \ </math> would be a bounded entire function, and thus constant. | ||
| − | [[ | + | [[Category:Complex Analysis]] |
Latest revision as of 01:02, August 14, 2018
In complex analysis, an entire function is a function that is analytic on the whole complex plane.
The main result governing the behavior of entire functions is Liouville's theorem, which states that a bounded entire function is constant. Here an entire function <math>f \ </math> is said to be bounded if there exists a constant <math>M \ </math> such that for all <math>z \in \mathbb{C} \ </math> the bound <math>f(z)<M \ </math> holds. Liouville's theorem yields a simple proof of the fundamental theorem of algebra: if <math>p(z) \ </math> were a polynomial with no roots in the complex plane, then one can prove that <math>1/p(z) \ </math> would be a bounded entire function, and thus constant.