Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

bob bundy
2013-05-02 17:10:18

hi limpfisch

For simplification I'll leave out the * (say, multiply), use I for the identity and  -1 for an inverse



multiply both sides by ab



Now multiply both sides by ba



Bob

limpfisch
2013-05-02 12:01:54

let a,b be members of a group (G,*). Show that if (a*b) inverse = (a inverse)*(b inverse) then a*b = b*a

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