What Is the Physical Meaning of These Vector Calculus Concepts?

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Discussion Overview

The discussion revolves around the physical meanings of various vector calculus concepts, specifically the curl and divergence of vector fields, the directional derivative, and the gradient of scalar fields. The scope includes theoretical interpretations and applications in physics.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant requests clarification on the physical meanings of curl, divergence, directional derivative, and gradient.
  • A link is provided to external resources that may offer insights into these concepts.
  • Another participant argues that there is no universal "physical meaning" for mathematical concepts, suggesting that mathematics should not be conflated with physics.
  • In contrast, a different participant asserts that these concepts were developed in the context of physics and emphasizes the importance of developing physical intuition alongside rigorous mathematical understanding.
  • This participant also uses an analogy involving computer processing power to illustrate the necessity of leveraging physical intuition in understanding these mathematical concepts.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between mathematics and physics, with some emphasizing the lack of a general physical meaning for mathematical concepts, while others advocate for the importance of physical intuition in understanding these concepts. The discussion remains unresolved regarding the extent to which physical meanings can be attributed to these mathematical ideas.

Contextual Notes

There are limitations in the discussion regarding the definitions and interpretations of the concepts mentioned, as well as the assumptions underlying the differing perspectives on the relationship between mathematics and physics.

shermaine80
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Hi,

May i know the physical meaning of the following:

(1) Curl of a vector field A(x,y,z)
(2) divergence of a vector field A(x,y,z)
(3) directional deriative of G(x,y,z)
(4) gradient of a scalar field G(x,y,z)
 
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Tac-Tics gives possible interpretations of those in a particular application. There is NO general "physical meaning" of a mathematical concept- mathematics is not physics.
 
These concepts were originally developed because of physics, and even the purest mathematics student should develop the physical intuition of it, while simultaneously developing the topic rigorously.

If you get a computer with a killer graphics card that can do floating point matrix computations really fast, then it would be stupid to write a program that uses the CPU instead. As humans, we have a killer "graphics card" and "physics card" built into our mind - it would be stupid not to use it.
 

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