Proofing the Equation: (A=B Union C & B ∩ C=Ø) => (A\B=C)

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Discussion Overview

The discussion revolves around proving the statement: (A = B union C and B intersect C = empty set) implies (A \ B = C). Participants are exploring the implications of set operations and seeking assistance in formal proof construction.

Discussion Character

  • Homework-related, Exploratory, Technical explanation

Main Points Raised

  • One participant requests help with proving a statement involving set operations.
  • Another participant points out that the request is for a proof of a statement rather than an equation and emphasizes the correct terminology.
  • A different participant suggests using a Venn diagram to visualize the problem and encourages the original poster to observe the implications from the diagram.
  • The original poster acknowledges the clarity gained from the Venn diagram but expresses difficulty in formulating a formal proof.
  • Another participant encourages the original poster to share their approach to the problem for further assistance.

Areas of Agreement / Disagreement

There is no consensus on the formal proof, and participants are offering different types of assistance and suggestions without resolving the original proof request.

Contextual Notes

Participants have not yet established the necessary steps or assumptions required for a formal proof, and there is an ongoing exploration of the implications of the set operations involved.

Violet1
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Hi! I need help for this:
Proof equation: (A=B union C and B intersect C=empty set)=>(A\B=C)!

Tnx! :o
 
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Hi and welcome to the forum.

What kind of help do you need? Surely you understand that if you take all women from a group of adults, you'll get all men and only men.

Please take some time to read the http://mathhelpboards.com/rules/, especially rule #11. Also, what you are proving is not an equation; it's a statement (claim, proposition, theorem) in the form of an implication. Finally, "proof" is a noun, and the corresponding verb is "prove".
 
Heh :D Perhaps Evengy overdid it a bit.

Okay, try drawing the Venn diagram. What do you observe? Do you see how obvious it is? Can you now sketch out a formal proof?

Balarka
.
 
:(
mathbalarka said:
Heh :D Perhaps Evengy overdid it a bit.

Okay, try drawing the Venn diagram. What do you observe? Do you see how obvious it is? Can you now sketch out a formal proof?

Balarka
.

Thanks Balarka! When I draw Venn diagram, everything is clear! But I can't sketch out a formal proof! :(
 
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Perhaps you could at least show us what approach you took?
 

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