List questions from rngs

Published on 12 Oct 2017 - 14:04

657

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Runs-Up/Down RNG test question.

Published on 17 Nov 2017 - 19:13

101

Views

$\mathrm{ann}(R/I) = I$ only when $R$ is unital?

Published on 29 Nov 2017 - 17:11

230

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A non-Boolean ring without unity with this property

Published on 23 Feb 2026 - 3:01

2.6k

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Finite rings of prime order must have a multiplicative identity

Published on 02 Nov 2010 - 9:06

3.6k

Views

Applications of rings without identity

Published on 02 Jan 2011 - 21:51

7.1k

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Non-unital rings: a few examples

Published on 07 May 2011 - 21:31

1.3k

Views

Ring homomorphisms which map a unit to a unit map unity to unity?

Published on 22 May 2011 - 7:24

4.1k

Views

Why are ideals more important than subrings?

Published on 30 May 2011 - 5:52

8.2k

Views

Does a finite commutative ring necessarily have a unity?

Published on 23 Feb 2026 - 21:11

665

Views

A finite commutative ring with the property that every element can be written as product of two elements is unital

Published on 23 Feb 2026 - 22:51

2.7k

Views

the ring of dual numbers over a field $k$

Published on 11 Aug 2011 - 14:33

2.7k

Views

Commutative rings without assuming identity

Published on 02 Jan 2012 - 1:31

473

Views

What is an element of a rng called which is not the product of any elements?

Published on 24 Jan 2012 - 14:49

434

Views

Prove that every commutative infinite rng $R$ has an infinite subrng $S$ s.t $S\neq R$

Published on 19 Feb 2012 - 16:11

List Question

Conditions on The Lemma 3.5.1 of Herstein

Runs-Up/Down RNG test question.

$\mathrm{ann}(R/I) = I$ only when $R$ is unital?

A non-Boolean ring without unity with this property

Finite rings of prime order must have a multiplicative identity

Applications of rings without identity

Non-unital rings: a few examples

Ring homomorphisms which map a unit to a unit map unity to unity?

Why are ideals more important than subrings?

Does a finite commutative ring necessarily have a unity?

A finite commutative ring with the property that every element can be written as product of two elements is unital

the ring of dual numbers over a field $k$

Commutative rings without assuming identity

What is an element of a rng called which is not the product of any elements?

Prove that every commutative infinite rng $R$ has an infinite subrng $S$ s.t $S\neq R$

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