Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homogeneous edge-disjoint $K_{2s}$ and $T_{st,t}$ unions   Let $r>2$ and $\sigma\in(0,r-1)$ be integers. We require $t<2s$, where
$t=2^{\sigma+1}-1$ and $s=2^{r-\sigma-1}$. Generalizing a known
$\{K_4,T_{6,3}\}$-ultrahomogenous graph $G_3^1$, we find that a finite,
connected, undirected, arc-transitive graph $G_r^\sigma$ exists each of whose
edges is shared by just two maximal subgraphs, namely a clique $X_0=K_{2s}$ and
a $t$-partite regular-Tur\'an graph $X_1=T_{st,t}$ on $s$ vertices per part.
Each copy $Y$ of $X_i$ ($i=0,1$) in $G_r^\sigma$ shares each edge with just one
copy of $X_{1-i}$ and all such copies of $X_{1-i}$ are pairwise distinct.
Moreover, $G_r^\sigma$ is an edge-disjoint union of copies of $X_i$, for
$i=0,1$. We prove that $G_r^\sigma$ is $\{K_{2s},T_{st,t}\}$-homogeneous if
$t<2s$, and just $\{T_{st,t}\}$-homogeneous otherwise, meaning that there is an
automorphism of $G_r^\sigma$ between any two such copies of $X_i$ relating two
preselected arcs.

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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: adap-org