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Complement Submodular Information Measures for Balanced and Robust Data Selection A Proof of a Conjecture on Positive and Negative Square Energies of Unicyclic Graphs Laplacian Spectrum of the Weakly Zero-Divisor Graph of a Finite Commutative Ring An identity for second Eulerian numbers via lattice-point counting $t$-tone edge coloring of graphs Constructing Maximal Bumpless Pipedreams for Double Grothendieck Polynomials Mubayi's Polynomial-Ideal Conjecture and Cover-Ideal Turán Methods Implicit Binarization via Complex Phase Dynamics in Combinatorial Optimization The limits of Schur multipliers in Pólya conversion problems for the $q$-permanent function Universality theorems for generalized splines Framing Triangulations for Arbitrary Integer Flow Polytopes On the Common Generalization of Gentle Algebras and Framed Directed Acyclic Graphs The complexity of frugal digraph homomorphisms Chaotic and periodic behavior of jeu de taquin on infinite Young tableaux Enumerating Pattern Avoiding Parking Functions Incidence toric ideals and three-point functions Unique Winning Opening Move in Three-Row Chomp Strong majority colorings of graphs A Balancing Theorem for Spanning Trees of Rectangular Grid Graphs Spectral radius and edge-disjoint connected factors of graphs New invariants for rank metric codes, with applications to the classification of rank two semifields of order 256 Flexible DP-4-coloring of planar graphs without 4-cycles and intersecting triangles Balanced intersection size distributions in projective planes List Reconstruction Problem with List Size Two Is Dimensionality a Barrier for Retrieval Models? 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Multi-cyclic graphs in the random graph process with restricted budget
Daniel Iľkovič, Jared León, Xichao Shu · 2024-12-23 · via math.CO updates on arXiv.org

We study a controlled random graph process introduced by Frieze, Krivelevich, and Michaeli. In this model, the edges of a complete graph are randomly ordered and revealed sequentially to a builder. For each edge revealed, the builder must irrevocably decide whether to purchase it. The process is subject to two constraints: the number of observed edges $t$ and the builder's budget $b$. The goal of the builder is to construct, with high probability, a graph possessing a desired property. Previously, the optimal dependencies of the budget $b$ on $n$ and $t$ were established for constructing a graph containing a fixed tree or cycle, and the authors claimed that their proof could be extended to any unicyclic graph. The problem, however, remained open for graphs containing at least two cycles, the smallest of which is the graph $K_4^-$ (a clique of size four with one edge removed). In this paper, we provide a strategy to construct a copy of the graph $K_4^-$ if $b \gg \max\left\{n^6 / t^4, n^{4 / 3} / t^{2 / 3}\right\}$, and show that this bound is tight, answering the question posed by Frieze et al. concerning this specific graph. We also give a strategy to construct a copy of a graph consisting of $k$ triangles intersecting at a single vertex (the $k$-fan) if $b \gg \max\left\{n^{4k - 1} / t^{3k - 1}, n / \sqrt{t}\right\}$, and also show that this bound is tight. These are the first optimal strategies for constructing a multi-cyclic graph in this random graph model.