Mathematical analysis is a part of mathematics. It is often shortened to analysis. It looks at functions, sequences and series. These have useful properties and characteristics that can be used in engineering. Mathematical analysis provides a rigorous logical foundation to calculus, which studies continuous functions, differentiation and integration. Mathematical analysis is a short version of its old name "infinitesimal analysis", with some of its key subfields including real analysis, complex analysis, differentiation equation and functional analysis.
Parts of mathematical analysisEdit
A foundational concept in mathematical analysis is the concept of limit. Limits are used to see what happens very close to things. Limits can also be used to see what happens when things get very big. For example, is never zero, but as n gets bigger, gets closer and closer to zero. The limit of as n gets bigger is zero. This is described by "The limit of as n goes to infinity is zero", and written as .
The counterpart would be . When the gets bigger, the limit goes to infinity. It is written as .
The fundamental theorem of algebra can be proven from some basic results in complex analysis. It says that every polynomial with real or complex coefficients has a complex root (where a root is a number x satisfying the equation , and some of these roots may be the same).
A function of the form , which is not linear, cannot be calculated like above. It is only possible to calculate the slope by using tangents and secants. The secant passes through two points and when the two points get closer, it turns into a tangent.
The new formula is .
This is called difference quotient. The gets now closer to . This can be expressed with the following formula:
The result is called derivative or slope of f at the point .
The integration is about the calculation of areas.
is read as "the integral of f with respect to x from a to b", and refers to the area between the x-axis, the graph of function f, and the lines x=a and x=b. The is the point where the area should start, and the where the area should ends.
Topics in analysisEdit
Concepts in analysisEdit
- "List of Calculus and Analysis Symbols". Math Vault. 2020-05-11. Retrieved 2020-09-19.
- Hartmut Seeger. Mathematik. Königswinter: Tandem Verlag. p. 17. ISBN 9 783833 107870.
- "Mathematical analysis - Encyclopedia of Mathematics". encyclopediaofmath.org. Retrieved 2020-09-19.
- Weisstein, Eric W. "Analysis". mathworld.wolfram.com. Retrieved 2020-09-19.