Publications

40) S. Costa, M. Dalai, S. Della Fiore, A. Pasotti: Definability of some $k$-ary Relations Over Second Order kinds of Logics. Communications in Combinatorics and Optimization. 2026, online first. DOI: 10.22049/cco.2026.31006.2705.

39) S. Costa, S. Della Fiore: Weak Freiman isomorphisms and sequencings of small sets. Discrete Mathematics. 2026, 349(8), 115077.

38) S. Costa, S. Della Fiore, M. A. Ollis: Sequencings in Semidirect Products via the Polynomial Method. In: Combinatorics and Combinatorial Computing, MCCCC 2022. Springer Proceedings in Mathematics \& Statistics. 2026, 516, 101--128.

37) S. Costa: Biembeddings of Archdeacon type: their full automorphism group and their number. Australasian Journal of Combinatorics. 2025, 93(3), 428--460.

36) S. Costa, S. Della Fiore, E. R. Engel: Graham's rearrangement for dihedral groups. Proceedings of the 13th European Conference on Combinatorics, Graph Theory and Applications EUROCOMB'25. 2025, 326--331.

35) S. Costa, S. Della Fiore, A. Ferraguti: Variants of the Erd\H{o}s distinct sums problem and variance method. Discrete Applied Mathematics. 2025, 369, 110--123.

34) S. Costa, M. Pavone: Orthogonal and oriented Fano planes, triangular embeddings of $K_7$, and geometrical representations of the Frobenius group $F_{21}$. AIMS Mathematics. 2024, 9(12), 35274--35292.

33) S. Costa, A. Pasotti: On the number of non-isomorphic (simple) $k$-gonal biembeddings of complete multipartite graphs. Ars Mathematica Contemporanea. 2024, 24(4), 585--608.

32) S. Costa, S. Della Fiore: Alternating parity weak sequencing. Journal of Combinatorial Designs. 2024, 32(6), 308--327.

31) S. Costa, L. Mella: A class of highly symmetric Archdeacon embeddings. Australasian Journal of Combinatorics. 2024, 88, 294--307.

30) S. Costa, L. Mella, A. Pasotti: Weak Heffter Arrays and biembedding graphs on non-orientable surfaces. Electronic Journal of Combinatorics. 2024, 31(1), P1.8.

29) S. Costa, S. Della Fiore: Bounds on the higher degree Erd\H{o}s-Ginzburg-Ziv constants over $\mathbb{F}^q_n$. Archiv der Mathematik. 2024, 122(1), 17--29.

28) S. Costa, S. Della Fiore, A. Ferraguti: Higher degree Erd\H{o}s distinct evaluations problem. Proceedings of the 12th European Conference on Combinatorics, Graph Theory and Applications EUROCOMB’23. 2023, 314--319.

27) S. Costa, S. Della Fiore: Existence of $\lambda$-fold non-zero sum Heffter arrays through local considerations. Australasian Journal of Combinatorics. 2023, 87, 301--339.

26) S. Costa, T. Traetta: Factorizing the Rado graph and infinite complete graphs. Ars Mathematica Contemporanea. 2023, 24(1), P1.02.

25) S. Costa, S. Della Fiore, M. Dalai: Variation on the Erd\H{o}s distinct-sums problem. Discrete Applied Mathematics. 2023, 325, 172--185.

24) S. Costa, S. Della Fiore, A. Pasotti: Non-zero sum Heffter arrays and their applications. Discrete Mathematics. 2022, 345, 112952.

23) S. Costa, S. Della Fiore, M.A. Ollis, S. Z. Rovner-Frydman: On Sequences in Cyclic Groups with Distinct Partial Sums. Electronic Journal of Combinatorics. 2022, 29, P3.33.

22) S. Costa, S. Della Fiore: Weak sequenceability in cyclic groups. Journal of Combinatorial Designs. 2022, 30, 735--751.

21) S. Della Fiore, S. Costa, M. Dalai: Improved Bounds for (b,k)-hashing. IEEE Transactions on Information Theory. 2022, 68(8), 4983--4997.

20) S. Costa, T. Traetta: Vertex-regular $1$-factorizations in infinite graphs. Journal of Combinatorial Designs. 2022, 30, 354--363.

19) S. Della Fiore, S. Costa, M. Dalai: New upper bounds for $(b,k)$-hashing. IEEE International Symposium on Information Theory (ISIT). 2021, 256--261.

18) S. Costa, A. Pasotti: On $\lambda$-fold relative Heffter arrays and biembedding multigraphs on surfaces. European Journal of Combinatorics. 2021, 97, 103370.

17) S. Costa, M. Dalai: New bounds for perfect $k$-hashing. Discrete Applied Mathematics. 2021, 289, 374--382.

16) S. Costa, M. Dalai: A gap in the slice rank of $k$-tensors. Journal of Combinatorial Theory, series A. 2021, 177, 10533.

15) S. Costa, M. Pellegrini: Some new results about a conjecture by Brian Alspach. Archiv der Mathematik. 2020, 115 (5), 479--488.

14) S. Costa, A. Pasotti, M. Pellegrini: Relative Heffter arrays and biembeddings. Ars Mathematica Contemporanea. 2020, 18, 241--271.

13) Y. Chang, S. Costa, T. Feng, X. Wang: Partitionable sets, almost partitionable sets and their applications. Journal of Combinatorial Designs. 2020, 28 (11), 783--813.

12) S. Costa: A complete solution to the infinite Oberwolfach problem. Journal of Combinatorial Designs. 2020, 28 (5), 366--383.

11) Y. Chang, S. Costa, T. Feng, X. Wang: Strong difference families of special types. Discrete Mathematics. 2020, 343 (4), 111776.

10) S. Costa, F. Morini, A. Pasotti, M.A. Pellegrini: A generalization of Heffter arrays. Journal of Combinatorial Designs. 2020, 28, 171--206.

9) S. Costa, M. Dalai, A. Pasotti: A tour problem on a toroidal board. The Australasian Journal of Combinatorics. 2020, 76 (1), 183--207.

8) S. Costa, T. Feng, X. Wang: Frame difference families and resolvable balanced incomplete block designs. Designs Codes and Cryptography. 2018, 86 (12), 2725--2745.

7) S. Costa, F. Morini, A. Pasotti, M.A. Pellegrini: Globally simple Heffter arrays and orthogonal cyclic cycle decompositions. The Australasian Journal of Combinatorics. 2018, 72 (3), 549--593.

6) S. Costa, T. Feng, X. Wang: New $2$-designs from strong difference families. Finite Fields and their applications. 2018, 50, 391--405.

5) S. Costa, F. Morini, A. Pasotti, M.A. Pellegrini: A problem on partial sums in abelian groups. Discrete Mathematics. 2018, 341 (3), 704--712.

4) M. Buratti, S. Costa, X. Wang: New $i$-Perfect Cycle Decompositions via Vertex Colorings of Graphs. Journal of Combinatorial Designs. 2016, 24 (11), 495--513.

3) S. Costa: On MPS construction of blocking sets in projective spaces: A generalization. Discrete Mathematics. 2016, 339 (2), 946--956.

2) S. Costa, S. Pianta: On $k$-symmetries of hyperbolic spaces. Differential Geometry and its Applications. 2013, 31 (5), 639--642.

1) S. Costa: Blocking Sets in $PG(r; q^{2n})$. Electronic Notes in Discrete Matematics. 2013, 40, 77--81.

Other publications or preprints

11) S. Costa: Zero-sum Ramsey numbers of bounded-treewidth graphs. Zenodo: 21896927, 2026.

10) S. Costa: Exact zero-sum Ramsey numbers for friendship graphs, books, and triangular windmills. Zenodo: 21896624, 2026.

9) S. Costa, S. Della Fiore, T. Feng, H. Liu: Kneserized Anticoncentration and Reverse Absorption for Graham's Rearrangement Conjecture. arXiv:2608.10015, 2026.

8) S. Costa, S. Della Fiore, M. Fontana: Slice and Partition Rank Criteria for Polynomial Zero-Avoidance. arXiv:2607.29490, 2026.

7) S. Costa, S. Della Fiore, M. Fontana, L. Vena: Graham conjecture on small sets in abelian groups. arXiv:2603.20961, 2026.

6) S. Costa, S. Della Fiore: New bounds for (weak) sequenceability in $\mathbb{Z}_k$. arXiv:2602.19989, 2026.

5) S. Costa: Anticoncentration of Random Sums in $\mathbb{Z}_p$. arXiv:2602.16595, 2026.

4) S. Costa, S. Della Fiore, E. Engel: Graham's rearrangement for dihedral groups. arXiv:2503.18101, 2025. Full version of the extended abstract published in the EUROCOMB'25 Proceedings.

3) S. Costa: Weak multiset sequenceability and weak BHR conjecture. arXiv:2403.06781, 2024.

2) S. Costa: Il Teorema dei Quattro Colori. Maddmaths (2013), no. 7.

1) S. Costa, S. Pianta: Kikkawa left loops and symmetric 2-structures. Quaderni del Seminario Matematico di Brescia (2011), no. 8.