Q* Meaning in Math: Understand the Concept

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SUMMARY

The discussion centers on the meaning of the notation ℚ* in mathematics, specifically in the context of Grimaldi's discrete math textbook. Participants conclude that ℚ* represents the set of non-zero rational numbers. The statement ℚ*∩ ℤ = ℤ is debated, with the consensus leaning towards its truth based on the definition of ℚ*. The lack of clarity in the textbook regarding the notation is noted as a significant issue.

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  • Understanding of set theory and notation in mathematics
  • Familiarity with rational numbers and their properties
  • Knowledge of discrete mathematics concepts
  • Access to Grimaldi's discrete math textbook for reference
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  • Research the properties of non-zero rational numbers
  • Study set operations and their implications in mathematics
  • Explore the notation used in discrete mathematics
  • Review Grimaldi's discrete math textbook for additional context
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Students studying discrete mathematics, educators teaching mathematical notation, and anyone seeking clarity on the properties of rational numbers.

r0bHadz
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Homework Statement


In Grimaldis discrete math book he asks

Determine which of the statements are true which are false:

ℚ*∩ ℤ = ℤ

Homework Equations

The Attempt at a Solution


he never explained in his book what * represents.

I tried google "what does Q* mean in mathematics" and "Q* in mathematics" with no luck. Does anyone know what he means with *? My first thought was its both Q+ and Q- but I don't think it is -l.-
 
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I believe that ℚ* is the set of non-zero rational numbers. (According to the Appendix)

Do you have a copy of Grimaldi's textbook?
 
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