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Calcrivo

Matrix Eigenvectors Calculator

Compute eigenvectors for each eigenvalue of a 2×2 or 3×3 real matrix.

Inputs

Eigenvectors

λ = 3: [1, 1] λ = 1: [-1, 1]

Eigenvalues Used

3, 1

Step by step

  1. Matrix A

    = 2 1 1 2

  2. Eigenvalues (real only)

    = 3, 1

  3. Eigenvectors (one per eigenvalue)

    = λ = 3: [1, 1] λ = 1: [-1, 1]

  4. Method

    = Null space of (A − λI) via RREF

How it works

An eigenvector v corresponding to eigenvalue λ satisfies (A − λI)v = 0. This calculator finds the null space of (A − λI) by row-reducing to RREF and reading off the free variables. Supported for 2×2 and 3×3 real matrices with real eigenvalues.

Formula

Eigenvector Equation

(A − λI)v = 0

A
Matrix
λ
Eigenvalue
v
Eigenvector
I
Identity

Frequently Asked Questions

Are eigenvectors unique?

No. Any scalar multiple of an eigenvector is also an eigenvector. This calculator returns one representative vector per eigenvalue, not normalised.

What if eigenvalues are complex?

This calculator only computes eigenvectors for real eigenvalues. Complex eigenvectors of real matrices are not currently supported.

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