Math Is Fun Forum
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
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#1 2009-02-21 00:29:01
- GemmaJ1988
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- Registered: 2008-10-08
- Posts: 39
closed under multiplication
I need to show |Z| is a subgroup of G, the first step is to show |Z| is closed under multiplication.
From definition |Z| is closed if any x,y in G implies xy is in G
Does anyone know how i can show this?
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#2 2009-02-21 03:04:46
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: closed under multiplication
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#3 2009-02-21 03:14:54
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: closed under multiplication
If not, then please state your question carefully.
Last edited by JaneFairfax (2009-02-21 03:37:42)
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