Linear independence and dependence

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Discussion Overview

The discussion revolves around the question of whether it is possible to construct a 2 x 2 matrix with linearly dependent columns and linearly independent rows. Participants explore the implications of linear dependence and independence in the context of matrix properties.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions the possibility of having a 2 x 2 matrix with linearly dependent columns and linearly independent rows, expressing uncertainty about any combinations that would satisfy this condition.
  • Another participant asserts that it is not possible, stating that linearly dependent columns result in a singular matrix, while linearly independent rows indicate a non-singular matrix.
  • A third participant acknowledges the previous point, indicating that it makes sense to them.
  • A later reply suggests that performing algebra could clarify the situation, implying that a mathematical approach may yield insights.

Areas of Agreement / Disagreement

Participants generally agree that the conditions of linear dependence and independence in this context are conflicting, but the discussion remains unresolved regarding the possibility of constructing such a matrix.

Contextual Notes

Participants have not provided a detailed algebraic exploration or specific examples to support their claims, leaving the discussion open to further mathematical analysis.

yoyo
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Hi everyone, having problems with this question, can anyone please help

Question: consider a 2 x 2 matrix, can you construct a matrix whose columns are linearly dependent and whose rows are linearly independent?

My answer is no. I cannot think of any combination that would make this true? Or is there? If so why?

Thanks
 
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No, because having linearly dependent columns gives a singular matrix yet linearly independent rows gives a non-singular matrix.
 
Thanks, make sense.
 
just do the algebra.
 

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