Roger Casals
Department of Mathematics
University of California Davis
casals -at- ucdavis.edu
Selected Articles
A Lagrangian filling for every cluster seed
,
Roger Casals, Honghao Gao
,
Inventiones Math.
237
(2024), 1–60.
Cluster structures on braid varieties
,
R. Casals, E. Gorsky, M. Gorsky,
I. Le,J. Simental, L. Shen
,
J. Amer. Math. Soc.
(2024), 1–111.
Microlocal Theory of Legendrian Links
and Cluster Algebras
,
Roger Casals, Daping Weng
,
Geometry & Topology
28
(2024), 1–119.
Infinitely Many Lagrangian Fillings
,
Roger Casals, Honghao Gao
,
Annals of Math
.
195
(2022), 207–249.
Legendrian Weaves
,
Roger Casals, Eric Zaslow
,
Geometry & Topology
26
(2022), 1–157.
Non-simplicity of isocontact embeddings
,
Roger Casals, John Etnyre
,
Geom. Funct. Anal.
(GAFA)
30
(2020), 1–33.
Geometric Criteria for Overtwistedness
,
Roger Casals, Emmy Murphy, F. Presas
,
J. Amer. Math. Soc.
32
(2019), 563–604.
Legendrian Fronts for Affine Varieties
,
Roger Casals, Emmy Murphy
,
Duke Math. Journal
168
(2019), 225–323.
Existence h-principle for Engel structures
,
R. Casals, J.L. Pérez, A. Pino, F. Presas
,
Inventiones Math.
210
(2017), 417–451.
Almost contact 5-folds are contact
,
R. Casals, D. Pancholi, F. Presas
,
Annals of Math.
182
(2015), 429–490.
List of Publications
Spectral Networks and Betti Lagrangians
with
Y.J. Nho
, 1–150.
Positive microlocal holonomies are globally regular
with
W. Li
, 1–35.
Demazure weaves for reduced plabic graphs
, with
I. Le
,
M. Sherman-Bennett
,
D. Weng
, 1–79.
Conjugate Fillings and Legendrian Weaves
with
W. Li
, 1–100.
Comparing cluster algebras on braid varieties
, with
P. Galashin
,
M. Gorsky
,
L. Shen
,
J. Simental
,
M. Sherman-Bennett
, 1-67.
Positroid Links and Braid Varieties
with
E. Gorsky
,
M. Gorsky
and
J. Simental
, 1–57.
Boundedness of Mutation Classes of Rank 3 Quivers
with K. Ke, 1–14.
A Lagrangian filling for every cluster seed
, with
H. Gao
,
Invent. Math.
(2024), 1–60.
Cluster structures on braid varieties
with
E. Gorsky
,
M. Gorsky
,
I. Le
,
J. Simental
,
L. Shen
,
J. Amer. Math. Soc.
(2024), 1–111.
A binary invariant of matrix mutation
,
J. Comb. Algebra
(2024), 1–16.
Microlocal Theory of Legendrian Links and Cluster Algebras
with
D. Weng
,
Geometry & Topology
28
(2024), 1–100.
Algebraic Weaves and Braid Varieties
with
E. Gorsky
,
M. Gorsky
and
J. Simental
,
Amer. J. Math.
(2024), 1–75.
On Newton polytopes of Lagrangian augmentations
with
O. Capovilla-Searle
,
Bulletin of the LMS
56
(2024), 1–28.
Stein Traces and Characterizing Slopes
with
J. Etnyre
and
M. Kegel
,
Math. Ann.
389
(2024), 1–46.
Infinitely Many Lagrangian Fillings
, with
H. Gao
,
Annals of Math.
195
(2022), 207–249.
Legendrian Weaves
, with
E. Zaslow
,
Geometry & Topology
26
(2022), 1–157.
Full Ellipsoid Embeddings and Toric Mutations
with
R. Vianna
,
Selecta Math. (N.S.)
28
(2022), 1–62.
Braid Loops with infinite monodromy on the Legendrian contact DGA
, with
L. Ng
,
J. Topology
15
(4) (2022), 1–82.
Lagrangian Skeleta and Plane Curve Singularities
,
JFPTA Viterbo 60 Volume
24
(2) (2022), 1–43.
Branched covering simply-connected 4-manifolds
, with
AIM Group,
D. Auckly, R.I. Baykur, S. Kolay, T. Lidman, D. Zuddas
MSP Open Book Ser.
5
(4) (2022), 1–11.
The Legendrian Whitney Trick
with
D. Pancholi
and
F. Presas
,
Geometry & Topology
25
(2021), 3229–3256.
Dynamical Quantization of Contact Structures
, with
G. Herczeg
and
A. Waldron
,
Adv. Theor. Math. Phys.
(2021), 1–45.
Non-simplicity of isocontact embeddings
with
J. Etnyre
,
Geom. Funct. Anal. (GAFA)
30
(2020), 1–33.
Geometric Criteria for Overtwistedness
, with
E. Murphy
and
F. Presas
,
J. Amer. Math. Soc.
,
32
(2019), 563–604.
Transverse Universal Links
, with
J. Etnyre
,
Proc. Sympos. Pure Math
102
(2019), 43–56.
Loose Engel structures
with
A. del Pino
and
F. Presas
,
Compositio Math.
156
(2019), 412–434.
Legendrian Fronts for Affine Varieties
, with
E. Murphy
,
Duke Math. Journal
168
(2019), 225–323.
OT Disks and Exotic Symplectic Structures
,
Proc. Amer. Math. Soc.
148
(2019), 825–834.
Differential algebra of cubic planar graphs
, with
E. Murphy
,
Advances in Math.
338
(2018), 401–446.
Classification of Engel Knots
, with
A. del Pino
,
Math. Annalen
371
(2018), 391–404.
Symplectomorphisms of exotic discs
, with
A. Keating
and
I. Smith
,
J. École Polytechnique
5
(2018), 289–316.
Existence h-principle for Engel structures
, with
J.L. Pérez
,
A. del Pino
and
F. Presas
,
Inventiones Math.
210
(2017), 417–451.
Higher Maslov Indices
, with
V.L. Ginzburg
and
F. Presas
,
J. Geom. Phys.
115
(2017), 167–177.
Contact topology from the loose viewpoint
, with
E. Murphy
,
Gökova Geom. Top.
22
(2016), 81–115.
On the strong orderability of overtwisted 3-folds
, with
F. Presas
,
Comment. Math. Helv.
91
(2016), 305–316.
Small positive loops on overtwisted manifolds
, with
F. Presas
and
S. Sandon
,
J. Symp. Geom.
14
(2016), 1013–1031.
Chern-Weil theory and the group of strict contactomorphisms
, with
O. Spáčil
,
J. Topol. Anal.
8
(2016), 59–87.
Almost contact 5-folds are contact
, with
D. Pancholi
and
F. Presas
,
Annals of Math.
182
(2015), 429–490.
h-principle for 4-dimensional contact foliations
, with
A. del Pino
and
F. Presas
,
Int. Math. Res. Not.
20
(2015), 176–207.
Contact blow-up
, with
D. Pancholi
and
F. Presas
,
Exp. Math.
33
(2015), 78–100.
A Remark on the Reeb Flow for Spheres
, with
F. Presas
,
J. Symp. Geom.
12
, 657–671.
CBMS Summer School 2025 (June 9-13)
Official website:
Legendrian Links and the Microlocal Theory of Sheaves
Material for lectures:
A microlocal introduction to Legendrian submanifolds
(draft in progress)
Some Awards
MCA Prize 2025
at the
Mathematical Congress of the Americas 2025
.
José Luis Rubio de Francia Prize
by the
Spanish Royal Mathematical Society
.
Vicent Caselles Prize
by the
Spanish Royal Mathematical Society
and the
BBVA Foundation
.
Sloan Research Fellowship
by the
Alfred P. Sloan Foundation
.
NSF Career Award
by the
National Science Foundation
.
Recent Teaching
Fall 2024:
Introduction to Abstract Mathematics
MAT-108
Fall 2024:
Differential Topology
MAT-239
Spring 2024:
Abstract Linear Algebra
MAT-67
Spring 2024:
Algebraic Topology II
MAT-215B
Spring 2023:
Calculus
MAT-21C
Spring 2023:
Morse Theory
MAT-240B
Fall 2021:
Contact and Symplectic Topology
MAT-280
Fall 2020:
Mathematical Quantum Mechanics
MAT-265
Media And Outreach
Contact and Symplectic Topology
,
Notices Amer. Math. Soc.
(2021).
On rays of light
by G. Watry,
Article
in The Aggie, an
Egghead Blog
post and
press release
.
RSME interview
in La Gaceta Magazine,
Interview
in El Mundo, and
article
on the Fundación BBVA.
Interview
in El Español,
RTVE
excerpt, and
Interview
in Tiempo.