On the Maximal Colorings of Complete Graphs Without Some Small Properly Colored Subgraphs
2021
Let $$\mathrm{pr}(K_{n}, G)$$
be the maximum number of colors in an edge-coloring of $$K_{n}$$
with no properly colored copy of G. For a family $${\mathcal {F}}$$
of graphs, let $$\mathrm{ex}(n, {\mathcal {F}})$$
be the maximum number of edges in a graph G on n vertices which does not contain any graphs in $${\mathcal {F}}$$
as subgraphs. In this paper, we show that $$\mathrm{pr}(K_{n}, G)-\mathrm{ex}(n, \mathcal {G'})=o(n^{2}), $$
where $$\mathcal {G'}=\{G-M: M \text { is a matching of }G\}$$
. Furthermore, we determine the value of $$\mathrm{pr}(K_{n}, P_{l})$$
for sufficiently large n and the exact value of $$\mathrm{pr}(K_{n}, G)$$
, where G is $$C_{5}, C_{6}$$
and $$K_{4}^{-}$$
, respectively. Also, we give an upper bound and a lower bound of $$\mathrm{pr}(K_{n}, K_{2,3})$$
.
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