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References to 'order (of a graph)'
1. adjacency matrix by CWoo
2. alternate form of sum of $r$th powers of the first $n$ positive integers by rm50
3. alternate proof of Mantel's theorem by lieven
4. asymptotics of central binomial coefficient by rspuzio
5. Bell's triangle by PrimeFan
6. birthday problem by PrimeFan
7. Bondy and Chv\'atal theorem by drini
8. combinations with repeated elements by kfgauss70
9. derangement by CWoo
10. difference set by CWoo
11. elementary proof of orders by Algeboy
12. elementary symmetric polynomial in terms of power sums by rspuzio
13. equivalence between the minor and topological minor of $K_5$ or $K_{3,3}$ by jwaixs
14. example of Latin squares by jgade
15. finite projective plane by Mathprof
16. generating function for the reciprocal alternating central binomial coefficients by juanman
17. geometric representation of relation composition by Jon Awbrey
18. graph-theoretic representation of relation composition by Jon Awbrey
19. Hamiltonian graph by drini
20. Kuratowski's theorem by bbukh
21. labeled graph by CWoo
22. magic square by drini
23. Mantel's theorem by digitalis
24. multi-index notation by matte
25. multiplicative encoding by PrimeFan
26. non-commuting graph by GrafZahl
27. Ore's theorem by Koro
28. orthogonal Latin squares by CWoo
29. projective line configurations by rspuzio
30. projective plane by yark
31. proof of Alon-Chung lemma by kshum
32. relation composition by Jon Awbrey
33. relation reduction by Jon Awbrey
34. size (of a graph) by mps
35. sum-product theorem by Algeboy
36. things counted by the Catalan numbers by rm50
37. Wagner's theorem by Mathprof