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- A field is a commutative, associative ring containing a unit1. In order to be a field, the following conditions must apply2:
- Associativity of addition and multiplication.
- Commutativity of addition and multiplication.
- Distributivity of multiplication over addition.
- Existence of identity elements for addition and multiplication.
- Existence of additive inverses.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.A field is a commutative, associative ring containing a unit in which the set of non-zero elements is not empty and forms a group under multiplication (cf. Associative rings and algebras). A field may also be characterized as a simple non-zero commutative, associative ring containing a unit.encyclopediaofmath.org/wiki/FieldIn order to be a field, the following conditions must apply:
- Associativity of addition and multiplication.
- commutativity of addition and mulitplication.
- distributivity of multiplication over addition.
studybuff.com/what-are-field-characteristics/characteristic of a field Quick Reference The smallest positive whole number n such that the sum of the multiplicative identity added to itself n times equals the additive identity. If no such n exists, the field is said to have characteristic zero.www.oxfordreference.com/display/10.1093/oi/autho…Some fields have the property that the cyclic additive group generated by $1$ is finite. If that happens, the least 'additive power' of $1$ that equals zero is called the characteristic of the field, and it's always prime.math.stackexchange.com/questions/464552/definiti…Note that in general, the characteristic of a field is always equal to that of its prime subfield. Another way of looking at this: the only way you can have a morphism between two fields (remember that they are always injective) is if the two fields have the same characteristic; embedding is definitely a morphism.math.stackexchange.com/questions/712056/charac… - People also ask
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As mentioned above, the characteristic of any field is either 0 or a prime number. A field of non-zero characteristic is called a field of finite characteristic or positive characteristic or prime characteristic. The characteristic exponent is defined similarly, except that it is equal to 1 when the characteristic is 0; otherwise … See more
In mathematics, the characteristic of a ring R, often denoted char(R), is defined to be the smallest positive number of copies of the ring's multiplicative identity (1) that will sum to the additive identity (0). If no such number exists, the … See more
If R and S are rings and there exists a ring homomorphism R → S, then the characteristic of S divides the characteristic of R. This can sometimes be used to exclude the … See more
The special definition of the characteristic zero is motivated by the equivalent definitions characterized in the next section, where the … See more
• The characteristic is the natural number n such that n$${\displaystyle \mathbb {Z} }$$ is the kernel of the unique ring homomorphism See more
• McCoy, Neal H. (1973) [1964]. The Theory of Rings. Chelsea Publishing. p. 4. ISBN 978-0-8284-0266-8. See more
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