Network of Resources for Hadamard Matrices and Generalizations

Resource Network for Orthogonal matrices in Combinatorics

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- Orthogonal Designs Wolf Holzmann, Hadi Kharaghani

- There are all weighing matrices of order 40 and 56

- The L-functions and modular forms database (LMFDB)
- Complex Hadamard Matrices catalog pages maintained by Bruzda, Tadej, Zyczkowski et al
- Butson Home, maintained by Lampio, Szollosi, Ostergard
- Dan Gordon’s databases, giving Covering Designs, Difference Sets, Circulant Weighing Matrices,Steiner Systems
- N. J. A. Sloane’s Library of Hadamard matrices, giving all equivalence classes up to order 28
- Jeff Dinitz’ maintained page of New results (post- second edition of the CRC Handbook) for Section 5, which includes Hadamard matrices and Orthogonal Designs
- Encyclopedia of Design Theory, by Peter Cameron
- Atlas of Weighing Matrices (AWM)
- Frank Ruskey’s Combinatorial Object Server
- Code Tables archive by Marcus Grassl
- MinT, the online database for optimal parameters of (t, m, s)-nets, (t, s)-sequences, orthogonal arrays, linear codes, and OOAs
- Jennifer Seberry's site at Nickolay Balonin's Leonard Euler Net mathscinet.ru
- web archive of Jennifer Seberry's papers
- Jennifer Seberry’s Home Page, with links to archived Hadamard matrices,Williamson Matrices, Good Matrices, Inequivalence Results, Weighing Matrices and Sequences, SBIBD, D-optimal designs, Almost Good Matrices (and other stuff)
- Christos Koukouvinos’ Design Theory directory, miscellaneous objects connected to this field
- OpenDreamKit: a European program that ended in 2019
- MaRDI: Mathematical Research Data Initiative: a German data infrastructure program
- MathDataHub
- International Mathematical Knowledge Trust

First Created: October 2021 Last Updated: October 2021