Is there a relationship between mod6, mod9, and mod3?

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Homework Help Overview

The discussion revolves around the relationships between modular arithmetic expressions, specifically focusing on the congruences x=2 (mod6) and x=3 (mod9). Participants are exploring whether these congruences can coexist and how they relate to mod3.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are attempting to prove the lack of a solution for the given modular equations. Questions arise regarding the implications of these congruences when considered under mod3.

Discussion Status

Some participants have offered hints and suggestions for exploring the relationship between the moduli, particularly regarding how to interpret the congruences in the context of mod3. There is an ongoing exploration of the implications of these relationships without a clear consensus yet.

Contextual Notes

Participants are discussing the implications of the modular equations and questioning the assumptions underlying their interpretations. There is a mention of the need to consider the results under different moduli, particularly mod3, but no definitive conclusions have been reached.

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x=2 (mod6)
x=3 (mod9)

has no solution

How can I prove this?
 
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gr3g1 said:
x=2 (mod6)
x=3 (mod9)

has no solution

How can I prove this?

Hi gr3g1! :smile:

Hint: what might it be mod3 ? :wink:
 
Sorry, I don't get it...
What might it be mod3?
 
I see that mod9 - mod6 gives mod3

Division of 3 gives an odd number
 
gr3g1 said:
I see that mod9 - mod6 gives mod3

Division of 3 gives an odd number

mod9-mod6=mod3? That's not right. What tiny-tim is suggesting is that if you know x=2 mod 6 then you can figure out what x is mod 3. Ditto for x=3 mod 9.
 

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