Sigurd Angenent, Jim Isenberg, Dan Knopf
*Degenerate neckpinches in Ricci flow*
J. Reine Angew. Math. **709** (2015), 81 – 117. (older version:
arxiv.org)

D Altschuler, SJ Altschuler, SB Angenent, LF Wu,
*The zoo of solitons for curve shortening in R^{n}*.
Nonlinearity

Sigurd Angenent, James Isenberg and Dan Knopf.
*Formal matched asymptotics for degenerate Ricci flow neckpinches.*
Nonlinearity **24** (2011), 2265-2280.

Sigurd Angenent, *Formal Asymptotic Expansions for Symmetric Ancient Ovals in
Mean Curvature Flow*. Conference in honor of Hiroshi Matano's
60th birthday.
PDF

Houk A, Jilkine S, Mejean CO, Boltyanskiy R, Dufresne ER, Angenent S,
Altschuler SJ, Wu LF, Weiner OD.
*Membrane tension maintains cell polarity by confining signals to the leading edge
during neutrophil migration.*
Cell, 148: 175-188 (2012).
Video Abstract.

Jilkine A., Angenent S.B., Wu L.F.& Altschuler S.J.,
*A Density-Dependent Switch Drives Stochastic Clustering and Polarization of Signaling
Molecules.*
PLoS Computational Biology, 2011 Nov;7(11):e1002271.

Sigurd Angenent, M.Cristina Caputo, Dan Knopf,
* Minimally Invasive Surgery for Ricci Flow Singularities, *
PDF. Journal für die reine und angewandte Mathematik, (2012), 39—87.

Steven J. Altschuler,
Sigurd B. Angenent,
Yanqin Wang &
Lani F. Wu,
*On the spontaneous emergence of cell polarity,*
Nature **454**, 886–889 (14 August 2008)

Sigurd Angenent,
Joost Hulshof,
Hiroshi Matano,
*The radius of vanishing bubbles in equivariant harmonic map
flow from D ^{2} to S^{2},*
SIAM J. Mathematical Analysis, vol.41(3), pp. 1121-1137 (2009)
PDF
PS

Ayelet Dominitz, Sigurd Angenent , Allen Tannenbaum.
*On the computation of optimal transport maps using gradient flows and multiresolution analysis.*
Recent advances in learning and control, 65--78, Lecture Notes in Control and Inform. Sci., 371, Springer, London, 2008.

Sigurd Angenent,
*Self-intersecting Geodesics and Entropy of the Geodesic Flow,*
Acta Math. Sinica. vol.24 (2008), no. 12, 1949--1952.
PDF

Sigurd Angenent, Dan
Knopf,
*Precise asymptotics in the Ricci flow neck pinch.* Communications in
Analysis and Geometry, 2007, vol.15, pages 773–844.
PDF

Sigurd Angenent,
Jan Bouwe van den Berg,
Rob van der Vorst ,
*Contact and noncontact type Hamiltonian systems generated by
second order Lagrangians*, Ergodic Theory and Dynamical Systems
vol.27 (2007), no. 1, 23--49.
PDF

Sigurd Angenent, Allen Tannenbaum, Anthony Yezzi Jr, Ofer
Zeitouni. *Curve shortening and interacting particle systems.
Statistics and analysis of shapes*, 303--311,
Model. Simul. Sci. Eng. Technol., Birkh�user Boston, Boston, MA,
2006.

Marc Niethammer,
Allen Tannenbaum, and Sigurd Angenent,
*Dynamic Active Contours for Visual Tracking*, IEEE Transactions on
Automatic Control, April 2006, vol **51** issue 4 pages 562—579.
PDF.
abstract

Sigurd Angenent, *Curve Shortening and the topology of closed
geodesics on surfaces*, Annals of Mathematics, **162**,
(2005) no.3 p.1185-1239
PS,
PDF

Sigurd Angenent, Joost
Hulshof, *Singularities at t=∞ in Equivariant Harmonic Map
Flow.* in “Geometric Evolution Equations,”
Shu-Cheng Chang, Ben Chow, Sun-Chin Chu, Chang-Shou Lin, editors.
Contemporary Mathematics **367**, American Mathematical
Society, January 2005
PDF

Sigurd Angenent, Dan
Knopf, *An example of neckpinching for Ricci flow on*
*S*^{n+1}. Mathematical Research Letters
**11** (2004), no. 4, 493--518.
PDF

Sigurd Angenent, Don G.Aronson, *The focusing problem for the Eikonal
Equation.*
Journal of Evolution Equations **3** (2003), no. 1, 137–151.
PDF

S.B. Angenent, D.G. Aronson, S.I. Betelu, J.S. Lowengrub,
* Focusing of an elongated hole in porous medium flow.* Physica D
** 151** (2001), 228--252.

Sigurd Angenent, Don G.Aronson, *Non axial self-similar hole filling
solutions to the porous medium equation*, Journal of the AMS
**14** (2001) pp.737-782.
PDF

Sigurd Angenent, Don G.Aronson, Santiago Betelú, *Renormalization
study of two-dimensional convergent solutions of the porous medium
equation,* Physica D **138** (2000), pp.344--359.
PDF

Sigurd Angenent, Rob van
der Vorst, , *A priori estimates and renormalized Morse indices of
solutions of an elliptic system*, Ann. Inst. H. Poincaré Anal. Non
Linéaire, PS
PDF

Sigurd
Angenent, Marek
Fila,
*Interior gradient blow-up in a semilinear parabolic equation*,
Journal of Differential and Integral Equations **9** (1996), no. 5,
865--877.
PDF

Sigurd Angenent, *Constructions with analytic semigroups and abstract
exponential decay results for eigenfunctions*, (proceedings of the
conference in honor of H.Amann's 60th birthday Birkhauser Verlag)
PS,
PDF

Sigurd Angenent, *A variational interpretation of Melnikov's function and
exponentially small separatrix splitting*, (Proceedings of a
conference on Symplectic Geometry held in Warwick, UK, 1990, drawings are
missing, sorry.)
PDF
, PS

Sigurd Angenent, *A remark on the topological entropy and invariant circles
of an area preserving twistmap*, (Proceedings of an IMA workshop on
Monotone twist maps and their applications, 5 pages)
PDF

Sigurd Angenent, *Inflection points, extatic points and Curve
Shortening*,
(Proceedings of the NATO workshop on Hamiltonian systems with 3 or
more degrees of freedom, S'Agarro, 1995; 11 pages.)
PS,
PDF

Sigurd Angenent, *Shrinking Doughnuts*,
(Proceedings of the Conference on Elliptic and Parabolic Equations, held
at Gregynog, Wales, August 1989; 18 pages.)
PDF.
The drawings are missing, except for these:
Fig3a.eps,
Fig3b.eps,
Fig3c.eps.

Sigurd Angenent, Eric Pichon, and
Allen Tannenbaum,
* Mathematical Methods of Medical Imaging*,
to appear, Bulletin of the AMS, (2006). 32 pages,
PDF

— PDF slides of a talk I gave for a non engineering audience in Groningen, 2005 and some animations related to the Minimizing Flows for the Monge-Kantorovich Problem of the following paper:

Steve Haker, Sigurd Angenent, Allen Tannenbaum, *Minimizing
Flows for the Monge-Kantorovich Problem*, (June 2002; To appear in
SIAM Journal of Math
Analysis) gzipped
postscript.

Steve Haker, Sigurd Angenent, Allen Tannenbaum, Ron Kikinis, *On Area
Preserving Mappings of Minimal Distortion*,
gzipped postscript.

Steve Haker, Sigurd Angenent, Allen Tannenbaum, Ron Kikinis,
*Angle-Preserving Flattening Maps and the 3D Visualization of Colon
CT Images,*(A similar paper appeared as " Nondistorting Flattening
Maps and the 3-D Visualization of Colon CT Images, IEEE Transactions
on Medical Imaging, **19**, pp.665-670, 2000.")
PDF

Steve Haker, Sigurd Angenent, Allen Tannenbaum, Ron Kikinis,
*Laplace-Beltrami Operator and Brain surface flattening*, IEEE
Transactions on Medical Imaging,**18**, pp.700-711, 1999.
PDF
(1.6Mb)