Two-by-two Kronecker block builder
Reconstruct block matrices from Kronecker factors.
Your entries stay in this page’s memory and are not submitted to us. Downloads are generated locally. Reloading or leaving the page clears your entries. Do not enter patient information.
Use comma-separated finite numbers on two lines. Magnitudes must be at most 1e9 and at least 1e-12, or zero.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Row 1
- 1, 0, 2, 0
- Row 2
- 0, 1, 0, 2
- Row 3
- 3, 0, 4, 0
- Row 4
- 0, 3, 0, 4
How to interpret the output
Builds A ⊗ B in row-major index order. Outputs four rows. This is an algebraic construction and does not validate a covariance model or its index labels. Source checked 12 November 2026.
Method reference