Tags that are frequently used incorrectly
The sums-of-squares tag is for questions about representations of integers as sums of squares, see the tag-wiki and relevant discussion on meta.
The ([tag:sums-of-squares]) tag is for questions about representations of integers as sums of squares, see the [tag-wiki](https://math.stackexchange.com/tags/sums-of-squares/info) and [relevant discussion on meta](http://meta.math.stackexchange.com/questions/12411/what-is-the-tag-sums-of-squares-intended-for).
The tag theorem-provers is for questions about software designed for checking formal proofs or assisting with writing them, see the tag-wiki. It is not intended for all questions which are about proofs of theorems.
The tag ([tag:theorem-provers]) is for questions about software designed for checking formal proofs or assisting with writing them, see the [tag-wiki](https://math.stackexchange.com/tags/theorem-provers/info). It is not intended for all questions which are about proofs of theorems.
The tag formal-proofs is for questions about proofs in various formal systems (e.g., natural deduction or Hilbert system), see the tag-wiki. It is not intended for all questions which are about rigorous mathematical proofs.
The tag ([tag:formal-proofs]) is for questions about proofs in various formal systems (e.g., natural deduction or Hilbert system), see the [tag-wiki](https://math.stackexchange.com/tags/formal-proofs/info). It is not intended for all questions which are about rigorous mathematical proofs.
The tag proof-theory is intended for questions about proof theory as a branch of mathematical logic, see the tag-wiki and relevant discussion on meta. It is not intended for all questions related to proofs.
The tag ([tag:proof-theory]) is intended for questions about proof theory as a branch of mathematical logic, see the [tag-wiki](https://math.stackexchange.com/tags/proof-theory/info) and relevant [discussion on meta](http://meta.math.stackexchange.com/questions/11195/the-proof-theory-tag-is-misused-too-often). It is not intended for all questions related to proofs.
- Summation and Sequences-and-Series
The tag summation is supposed to be about finite sums (see the tag-wiki.) The tag sequences-and-series is for infinite series.
The tag ([tag:summation]) is supposed to be about finite sums (see the [tag-wiki](https://math.stackexchange.com/tags/summation/info).) The tag ([tag:sequences-and-series]) is for infinite series.
The tag algebraic-geometry is intended for questions in a branch of mathematics called algebraic geometry (see the tag-wiki.) The tags algebra-precalculus and/or geometry should be used for basic problems that involve both algebra and geometry.
The tag ([tag:algebraic-geometry]) is intended for questions in a branch of mathematics called algebraic geometry (see the [tag-wiki](https://math.stackexchange.com/tags/algebraic-geometry/info).) The tags ([tag:algebra-precalculus]) and/or ([tag:geometry]) should be used for basic problems that involve both algebra and geometry.
The tag complex-geometry is intended for questions about complex manifolds, see the tag-info. In particular, this tag is not suitable for questions about basic properties of complex numbers.
The tag ([tag:complex-geometry]) is intended for questions about complex manifolds, see [the tag-info](https://math.stackexchange.com/tags/complex-geometry/info). In particular, this tag is not suitable for questions about basic properties of complex numbers.
- Integral domain for Integration
An integral domain is a commutative ring with no zero divisors. The tag integral-domain should be used for questions about such rings, not for questions about integration.
An [integral domain](http://en.wikipedia.org/wiki/Integral_domain) is a commutative ring with no zero divisors. The tag ([tag:integral-domain]) should be used for questions about such rings, not for questions about integration.
- Probability theory for Probability
Probability theory is about the measure-theoretic foundations of stochastics. The tag probability-theory should be used for questions concerning this subject, not for questions about calculating a specific probability. Use probability instead, see also meta.
[Probability theory](http://en.wikipedia.org/wiki/Probability_theory) is about the measure-theoretic foundations of stochastics. The tag ([tag:probability-theory]) should be used for questions concerning this subject, not for questions about calculating a specific probability. Use ([tag:probability]) instead, see also [meta](http://meta.math.stackexchange.com/questions/1686/the-tags-probability-and-probability-theory).
- Roots and arithmetic or radicals
The tag roots is for zeroes of functions, the tags arithmetic and radicals are better tags for questions about square roots, cube roots, etc. From roots tag-info: For questions about "square roots", "cube roots", and such, consider using the (radicals) and (arithmetic) tags.
The tag ([tag:roots]) is for zeroes of functions, the tags ([tag:arithmetic]) and ([tag:radicals]) are better tags for questions about square roots, cube roots, etc. From [roots tag-info](https://math.stackexchange.com/tags/roots/info): For questions about "square roots", "cube roots", and such, consider using the (radicals) and (arithmetic) tags.
The tag filters is intended for filters in set-theoretical and order-theoretical sense; see the tag description.
The tag ([tag:filters]) is intended for [filters](http://en.wikipedia.org/wiki/Filter_%28mathematics%29) in set-theoretical and order-theoretical sense; see the [tag description](https://math.stackexchange.com/tags/filters/info).
I have added this mainly because people keep using this tag in connection with Kalman filter and similar stuff. See also this discussion.
The tag dimension-theory-algebra is not intended for questions about dimension of vector spaces from linear algebra, see the tag-info for more details.
The tag ([tag:dimension-theory-algebra]) is not intended for questions about dimension of vector spaces from linear algebra, see [the tag-info](https://math.stackexchange.com/tags/dimension-theory-algebra/info) for more details.
- Euler's constant and Euler's number
The tag euler-mascheroni-constant is intended for questions about Euler-Mascheroni constant $\gamma$, see the tag-info. For questions about Euler's number $e$ you can use the tag eulers-number-e.
The tag ([tag:euler-mascheroni-constant]) is intended for questions about [Euler-Mascheroni constant](http://en.wikipedia.org/wiki/Euler-Mascheroni_constant) $\gamma$, see the [tag-info](https://math.stackexchange.com/tags/eulers-constant/info). For questions about [Euler's number](https://en.wikipedia.org/wiki/E_%28mathematical_constant%29) $e$ you can use the tag ([tag:eulers-number-e]).
The tag intersection-theory is for the question about a branch of algebraic geometry called intersection theory. It is not for questions about intersections of sets, calculating intersections of two lines and other similar questions.
The tag ([tag:intersection-theory]) is for the question about a branch of algebraic geometry called [intersection theory](https://en.wikipedia.org/wiki/Intersection_theory). It is not for questions about intersections of sets, calculating intersections of two lines and other similar questions.
The tag independence is for question about independent events in probability theory, see the tag-info.
The tag ([tag:independence]) is for question about independent events in probability theory, see the [tag-info](https://math.stackexchange.com/tags/independence/info).
- Functional Equations and Functional Analysis
The tag functional-analysis is intended for questions about infinite dimensional vector spaces, there is a separate tag for functional-equations; see the tag-wiki and the tag-excerpt. (The tag-excerpt is also shown when you are adding a tag to a question.)
The tag ([tag:functional-analysis]) is intended for questions about infinite dimensional vector spaces, there is a separate tag for ([tag:functional-equations]); see the [tag-wiki](https://math.stackexchange.com/tags/functional-analysis/info) and the tag-excerpt. (The tag-excerpt is also shown when you are adding a tag to a question.)
Logic
The tag logic should be used for questions about mathematical logic, see the tag-info.
The tag ([tag:logic]) should be used for questions about [mathematical logic](https://en.wikipedia.org/wiki/Mathematical_logic), see [the tag-info](https://math.stackexchange.com/tags/logic/info).