Relation between log function and its characteristic g

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Discussion Overview

The discussion revolves around the relationship between the logarithmic function and its characteristic integer g, specifically examining the inequality $$ g \le \log n < g + 1 $$ for natural numbers n and a logarithm base b > 1. Participants explore the implications of this inequality and whether it holds for all integers g.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant presents the inequality and seeks a proof, questioning whether g must be an integer.
  • Another participant interprets the inequality as indicating that for any positive integer n, log(n) lies between two integers, g and g + 1, providing examples to illustrate this point.
  • A later reply acknowledges the intuitive nature of the relationship as suggested by the graph of the logarithmic function.
  • Another participant asserts that every number satisfies a similar inequality with respect to some integer n, implying a broader mathematical principle.
  • One participant expresses surprise at not having considered the intuitive aspect earlier, indicating a shift in understanding.

Areas of Agreement / Disagreement

Participants generally agree on the intuitive nature of the inequality as it relates to the logarithmic function, but there is no consensus on the need for a formal proof or the specific conditions under which g applies.

Contextual Notes

The discussion does not resolve whether the inequality requires a formal proof or if the intuitive understanding is sufficient. There is also ambiguity regarding the conditions for g and whether it applies to all integers.

Who May Find This Useful

Individuals interested in logarithmic functions, inequalities, and mathematical proofs may find this discussion relevant.

elliti123
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I have come across this inequality:$$ g≤ log\ n <g + 1$$
We assume that the base of the log is b >1 and n is all the natural numbers. I would like to know if anyone could provide a proof regarding this and mention for what g ? Is it for all the g which are integers ?
 
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elliti123 said:
I have come across this inequality:$$ g≤ log\ n <g + 1$$
We assume that the base of the log is b >1 and n is all the natural numbers. I would like to know if anyone could provide a proof regarding this and mention for what g ? Is it for all the g which are integers ?

It seems to me that this is saying that, for any positive integer n, log(n) lies between two other integers, g and g + 1. For example, ##2 \le \log_{10}(100) < 3## and ##1 \le \log_{10}(13) < 2##. If you look at the graph of ##y = \log_b(x)##, this seems pretty obvious, and isn't something that would require a proof.
 
Yes i just looked at the graph it does seem to come pretty natural to mind. Thanks for the hint.
 
?? Every number, x, satisfies n\le x&lt; n+ 1 for some integer n.
 
HAHA i can't believe i did not look at it like that. Thanks.
 

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