Geodesic
Even astral configurations
The electronic journal of combinatorics, Tome 11 (2004) no. 1
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A configuration $(p_q, n_k)$ is a collection of $p$ points and $n$ straight lines in the Euclidean plane so that every point has $q$ straight lines passing through it and every line has $k$ points lying on it. A configuration is astral if it has precisely $\lfloor {q+1\over2} \rfloor$ symmetry classes (transitivity classes) of lines and $\lfloor{k+1\over2} \rfloor$ symmetry classes of points. An even astral configuration is an astral configuration configuration where $q$ and $k$ are both even. This paper completes the classification of all even astral configurations.
DOI : 10.37236/1790
Classification : 51A20, 52C35, 05B30 
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     author = {Leah Wrenn Berman},
     title = {Even astral configurations},
     journal = {The electronic journal of combinatorics},
     year = {2004},
     volume = {11},
     number = {1},
     doi = {10.37236/1790},
     zbl = {1053.51002},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1790/}
}
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Leah Wrenn Berman. Even astral configurations. The electronic journal of combinatorics, Tome 11 (2004) no. 1. doi: 10.37236/1790

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