Math Problem Statement

Fie permutările α și β date. Rezolvați ecuațiile xα = β și βy = α^3.

Solution

The image presents a problem involving permutations. The permutations are given as follows:

  • Permutation α\alpha is defined as: \begin{pmatrix} 1 & 2 & 3 & 4 \\ 3 & 4 & 1 & 2 \end{pmatrix}$$ which means $$\alpha(1) = 3$$, $$\alpha(2) = 4$$, $$\alpha(3) = 1$$, and $$\alpha(4) = 2$$.
  • Permutation β\beta is defined as: \begin{pmatrix} 1 & 2 & 3 & 4 \\ 4 & 2 & 1 & 3 \end{pmatrix}$$ which means $$\beta(1) = 4$$, $$\beta(2) = 2$$, $$\beta(3) = 1$$, and $$\beta(4) = 3$$.

The problem requires solving the equations:

  1. xα=βx \alpha = \beta
  2. βy=α3\beta y = \alpha^3

Step-by-step approach:

  1. Solve the equation xα=βx \alpha = \beta:

    • We need to find the permutation xx such that when it is composed with α\alpha, it gives β\beta.
    • This requires finding x=βα1x = \beta \alpha^{-1}, where α1\alpha^{-1} is the inverse of α\alpha.
  2. Solve the equation βy=α3\beta y = \alpha^3:

    • Here, we are required to find the permutation yy such that when composed with β\beta, it gives α3\alpha^3.
    • This requires y=β1α3y = \beta^{-1} \alpha^3, where β1\beta^{-1} is the inverse of β\beta, and α3\alpha^3 is the cube of the permutation α\alpha (computed by applying α\alpha three times).

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Math Problem Analysis

Mathematical Concepts

Permutation
Group Theory
Algebra

Formulas

x = βα⁻¹
y = β⁻¹α³

Theorems

Permutation inversion
Permutation composition

Suitable Grade Level

University-level (Abstract Algebra)