Publications
This page contains links to most of my publications. Some others can be found on the
arxiv.
Submitted
Appeared
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Reduced clique graphs: a correction to "Chordal graphs and their clique graphs"
With Andrew Probert.
Graphs and Combinatorics 40 (2024) no. 58.
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Supersolvable saturated matroids and chordal graphs
With Andrew Probert.
Adv. in Appl. Math. 153 (2024) Article 102616.
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Tree automata and pigeonhole classes of matroids: II
With Daryl Funk and Mike Newman.
Electron. J. Combin. 30 (2023), no. 3, Paper #P3.6.
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Tree automata and pigeonhole classes of matroids: I
With Daryl Funk and Mike Newman.
Algorithmica. 84 (2022) 1795–1834.
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Defining bicircular matroids in monadic logic
With Daryl Funk and Mike Newman.
Q. J. Math. 73 (2022), no. 1, 65-92.
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Obstructions for bounded branch-depth in matroids
With J. Pascal Gollin, Kevin Hendrey, and Sang-Il Oum.
Advances in Combinatorics. https://doi.org/10.19086/aic.24227.
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Fractal classes of matroids
With Mike Newman and Geoff Whittle.
Adv. in Appl. Math. 126 (2021) Article 101995.
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Excluded minors for the class of split matroids
With Amanda Cameron.
Australas. J. Combin 79 (2021), no. 2, 195-204.
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The unbreakable frame matroids
With Tara Fife, James Oxley, and Charles Semple.
SIAM J. Discrete Math. 34 (2020), no. 3, 1522-1537.
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Effective versions of two theorems of Rado
With Jason Bell, Daryl Funk, and Byoung Du Kim.
Q. J. Math. 71 (2020), no. 2, 599-618.
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Structure of cubic Lehman matrices
With Irene Pivotto and Gordon Royle.
Electron. J. Combin. 26 (2019), no. 3, Paper #P3.54.
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Yes, the "missing axiom" of matroid theory is lost forever
With Mike Newman and Geoff Whittle.
Trans. Amer. Math. Soc. 370 (2018), no. 8, 5907-5929.
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On excluded minors for classes of graphical matroids
With Daryl Funk.
Discrete Math. 341 (2018), no. 6, 1509-1522.
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How many delta-matroids are there?
With Daryl Funk and Steven Noble.
European J. Combin. 69 (2018) 149-158.
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Excluding Kuratowski graphs and their duals from binary matroids
With Gordon Royle and Geoff Whittle.
J. Comb. Theory, Ser. B 125 (2017) 95-113.
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Towards a splitter theorem for internally 4-connected binary matroids IX: the theorem
With Carolyn Chun and James Oxley.
J. Comb. Theory, Ser. B 121 (2016) 2-67.
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Towards a splitter theorem for internally 4-connected binary matroids VIII: small matroids
With Carolyn Chun and James Oxley.
Adv. in Appl. Math. 85 (2017), 12-30.
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Unavoidable connected matroids retaining a specified minor
With Carolyn Chun, Guoli Ding, and James Oxley.
SIAM. J. Discrete Math. 30 (2016), no. 3, 1590-1606.
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The structure of {U25,U35}-fragile matroids
With Ben Clark, Geoff Whittle, and Stefan van Zwam.
SIAM. J. Discrete Math. 30 (2016), no. 3, 1480-1508.
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Fan-extensions in fragile matroids
With Carolyn Chun, Deborah Chun, and Stefan van Zwam.
Electron. J. Combin. 22 (2015), no. 2, Paper #P2.30.
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Obstacles to decomposition theorems for sixth-root-of-unity matroids
With Carolyn Chun and Mike Newman.
Ann. Comb. 19 (2015), no. 1, 79-93.
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Is the missing axiom of matroid theory lost forever?
With Mike Newman and Geoff Whittle.
Q. J. Math. 65 (2014), no. 4, 1397-1415.
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Maximum size binary matroids with no AG(3,2)-minor are graphic
With Joseph Kung, Irene Pivotto, and Gordon Royle.
SIAM J. Discrete Math. 28 (2014), no. 3, 1559-1577.
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Towards a splitter theorem for internally 4-connected binary matroids V
With Carolyn Chun and James Oxley.
Adv. in Appl. Math. 52 (2014), no. 1, 60-81.
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Towards a splitter theorem for internally 4-connected binary matroids IV
With Carolyn Chun and James Oxley.
Adv. in Appl. Math. 52 (2014), no. 1, 1-59.
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Towards a splitter theorem for internally 4-connected binary matroids III
With Carolyn Chun and James Oxley.
Adv. in Appl. Math. 51 (2013), no. 2, 309-344.
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Towards a splitter theorem for internally 4-connected binary matroids II
With Carolyn Chun and James Oxley.
European J. Combin. 36 (2014) 550-563.
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Constructing internally 4-connected binary matroids
With Carolyn Chun and James Oxley.
Adv. in Appl. Math. 50 (2013), no. 1, 16-45.
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On the number of sparse paving matroids
With Dominic Welsh.
Adv. in Appl. Math. 50 (2013), no. 1, 125-131.
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On the relative importance of excluded minors
With Rhiannon Hall and Stefan van Zwam.
Adv. in Appl. Math. 50 (2013), no. 1, 228-242.
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The structure of graphs with a vital linkage of order 2
With Geoff Whittle and Stefan van Zwam.
J. Graph Theory 71 (2012), no. 2, 176-181.
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The internally 4-connected binary matroids with no M(K5\e)-minor
With Gordon Royle.
SIAM J. Discrete Math. 26 (2012), no. 2, 755-767.
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Stability, fragility, and Rota's conjecture
With Geoff Whittle and Stefan van Zwam.
J. Comb. Theory, Ser. B 102 (2012), no. 3, 760-783.
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Towards a splitter theorem for internally 4-connected binary matroids
With Carolyn Chun and James Oxley.
J. Comb. Theory, Ser. B 102 (2012), no. 3, 688-700.
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The excluded minors for the class of matroids that are binary or ternary
With Bogdan Oporowski, James Oxley, and Geoff Whittle.
European J. Combin. 32 (2011), no. 6, 891-930.
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On the asymptotic proportion of connected matroids
With Mike Newman, Dominic Welsh, and Geoff Whittle.
European J. Combin. 32 (2011), no. 6, 882-890.
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The excluded minors for near-regular matroids
With Rhiannon Hall and Stefan van Zwam.
European J. Combin. 32 (2011), no. 6, 802-830.
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A chain theorem for internally 4-connected binary matroids
With Carolyn Chun and James Oxley.
J. Combin. Theory, Ser. B 101 (2011), no. 3, 141-189.
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An obstacle to a decomposition theorem for near-regular matroids
With Geoff Whittle and Stefan van Zwam.
SIAM J. Discrete Math. 25 (2011), no. 1, 271-279.
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The internally 4-connected binary matroids with no M(K3,3)-minor
With Gordon Royle and Geoff Whittle.
Memoirs of the AMS, 208 (2010), no. 981.
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On excluded minors for real-representability
With Mike Newman and Geoff Whittle.
J. Combin. Theory, Ser. B 99 (2009), no. 4, 685-689.
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Contracting an element from a cocircuit
With Rhiannon Hall.
Adv. in Appl. Math. 41 (2008), no. 4, 510-529.
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Matroids with nine elements
With Gordon Royle.
J. Combin. Theory, Ser. B 98 (2008), no. 2, 415-431.
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Matroid complexity and nonsuccinct descriptions
SIAM J. Discrete Math. 22 (2008), no. 2, 455-466.
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Circuits and cocircuits in regular matroids
Graphs Combin. 22 (2006), no. 3, 383-389.
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Equitable matroids
Electron. J. Combin. 13 (2006), no. 1, Research Paper 41.
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Inequivalent representations of bias matroids
Combin. Probab. Comput. 14 (2005), no. 4, 567-583.
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Families of matroids induced by classes of graphs
Adv. in Appl. Math. 34 (2005), no. 3, 616-633.