olemus
(1) matemaatika haru,
uurib tehete üldisi omadusi
= one of the broad areas of mathematics, the study of general properties of operations

https://en.wikipedia.org/wiki/Algebra

https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra

http://www2.math.umd.edu/~jcohen/402/Pinter%20Algebra.pdf

(2) vektorruum,
milles on defineeritud bilineaarne korrutusfunktsioon
= vector space with multiplication

http://people.math.harvard.edu/~elkies/M250.04/kalgebra.html

https://en.wikibooks.org/wiki/Abstract_Algebra/Algebras

(3) = algebraline struktuur

vt ka
https://en.wikipedia.org/wiki/Algebra_(disambiguation)

vt ka
- alamalgebra
- algebraline arv
- algebraline element
- algebraline laiend
- algebraline muutkond
- algebraline rühm
- algebraline sulund
- algebraline võrrand, polünomiaalne võrrand
- algebraliselt kinnine korpus
- algebraliselt sõltumatu hulk
- algebrate otsekorrutis
- Boole'i algebra
- Heytingi algebra
- lineaaralgebra
- sigma-algebra
- universaalalgebra