Finding Basis of 5x5 Matrix: A - A^T

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SUMMARY

The discussion centers on the method of finding a basis for a 5x5 matrix by calculating the difference between the matrix A and its transpose, denoted as (A - A^T). This approach simplifies the process of determining the null space of the resulting matrix. The technique is confirmed as a valid guideline for efficiently finding the basis of such matrices, particularly in linear algebra contexts.

PREREQUISITES
  • Understanding of linear algebra concepts, specifically matrix operations.
  • Familiarity with null space and basis of vector spaces.
  • Knowledge of matrix transposition and its properties.
  • Experience with solving linear equations and systems.
NEXT STEPS
  • Research the properties of matrix transposition in linear algebra.
  • Learn about null space and how to compute it for matrices.
  • Explore the implications of symmetric matrices in relation to (A - A^T).
  • Study examples of basis finding for different matrix sizes and types.
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Students and professionals in mathematics, particularly those studying linear algebra, as well as educators looking for efficient methods to teach matrix theory.

ND3G
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In a solution to an old exam the prof found a basis of a 5x5 matrix by simply subtracting the transpose of A from A aka(A - A^T) and then found the basis for the null for the now much simplified matrix.

Is that a general guideline I can follow? If so it would make my life a lot easier.
 
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Have you posted where you meant to post? That sounds a lot more like Maths than Physics.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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