Why is a periodic function Time Variant?

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Discussion Overview

The discussion centers on the nature of periodic functions and their classification as time-variant systems. Participants explore the definitions and implications of periodicity in relation to time dependence, considering both theoretical and conceptual aspects.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant states that a periodic function does not take the same value for all times, suggesting this is a reason for its classification as time-variant.
  • Another participant notes that the definition of periodicity involves occurrences at specific intervals of time, implying a relationship to time variance.
  • A different viewpoint proposes that a periodic function can be considered a time-variant system only within the limits of its periodic time constant, suggesting a nuanced understanding of time variance.
  • This participant also introduces the idea that, despite periodic functions producing the same output for certain time differences, they may still be viewed as "limited time variant."

Areas of Agreement / Disagreement

Participants express differing views on the classification of periodic functions as time-variant, with no consensus reached on the definitions or implications discussed.

Contextual Notes

There are unresolved aspects regarding the definitions of time variance and periodicity, as well as the implications of time constants on the classification of functions.

Dorshoshani
Hey,
I hope you can help me.
I can't understand why periodic function is Time Variant.

thanks
Dor.
 
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Because it does not take the same value for all times.
 
The definition of periodic means occurring at intervals of time.
 
In my opinion, a periodic function is a time variant system if the considered time is in the limits of the periodic time constant.
However, since a different input value produces a same output value if the time difference is a multiple of time constant you may consider a periodic function as a "limited time variant”.
 

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