scot@KINSMAN.DARTMOUTH.EDU (Scot Drysdale) (03/04/91)
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{\Large\bf 7th Annual Symposium on}
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{\huge\bf COMPUTATIONAL \\[0.3cm]
GEOMETRY }
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\begin{center}
{\Large\bf
June 10--12, 1991 \\[0.2cm]
Red Jacket Mountain View \\
North Conway, New Hampshire \\
}
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{\bf Sponsored by the ACM Special Interest \\
Groups for Graphics and for \\
Automata and Computability Theory}
\end{center}
\newpage
\footnotesize
\begin{center}
{\normalsize\bf Seventh Annual Symposium on} \\
{\normalsize\bf Computational Geometry} \\
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{\normalsize\bf Advance Registration Form}
\end{center}
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\parindent=0pt
Please send this form, or a copy, together with a check or money order
made out in US dollars and payable to
{\em 7th ACM Symp.\ on Computational Geometry} to:
\begin{itemize}
\item[]
Linda Hathorn \\
Conference Administration, Hallgarten Hall \\
Dartmouth College \\
Hanover, NH 03755
\end{itemize}
\begin{tabular}{lrr}
{\bf Registration Fee} & Before May 13 & After May 13 \\
ACM members & \$220\ $\Box$ & \$270\ $\Box$ \\
Nonmembers & \$255\ $\Box$ & \$305\ $\Box$ \\
Students & \$\ 90\ $\Box$ & \$\ 120\ $\Box$ \\
\end{tabular}
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\begin{tabular}{lrr}
Registration & & \$ \vbox{\hrule width .5in} \\
Extra clambake & \vbox{\hrule width .2in} @ \$22\ & \$ \vbox{\hrule width .5in}
\\
Extra excursion & \vbox{\hrule width .2in} @ \$10\ & \$ \vbox{\hrule width .5in}
\\
Total & & \$ \hrulefill
\end{tabular}
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Firstname\ \dotfill Lastname\ \dotfill \mbox{} \\
Affiliation\ \dotfill \mbox{} \\
Address\ \dotfill \mbox{} \\
\mbox{} \ \ \ \ \ \dotfill \mbox{} \\
Phone\ \dotfill \mbox{} \\
Email\ \dotfill \mbox{} \\
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Dietary restriction: \hfill $\Box$ Vegetarian \hfill $\Box$ Kosher \\
Regular registration includes a copy of the Proceedings, the reception,
lunches, the excursion, the clambake, and coffee breaks. Student registration
includes everything except the excursion and clambake. Additional excursion
and clambake tickets are available for students, family members, or friends
and should be ordered in advance using this form.
\mbox{} \hrulefill \mbox{} \\
{\bf Children and Child Care:\ \ }
The hotel caters to families and children.
Rooms with accommodations for children
are available and child care can be arranged.
Contact the hotel (see next page) for more information.
\newpage
\begin{center}
{\normalsize\bf Hotel Reservations}
\end{center}
Please check the appropriate room rate. Prices are per person, and include
tax. \\
\begin{tabular}{lr}
Single & \$75.00\ $\Box$ \\
Double & \$43.00\ $\Box$ \\
Triple & \$33.50\ $\Box$ \\
Quad & \$27.50\ $\Box$ \\
\end{tabular}
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Arrival date and time & \vbox{\hrule width 1in} \\
Departure date & \vbox{\hrule width 1in} \\
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Name\ \dotfill \mbox{} \\
Address\ \dotfill \mbox{} \\
\mbox{} \ \ \ \ \ \dotfill \mbox{} \\
Phone\ \dotfill \mbox{} \\
Roomate(s)\ \dotfill \mbox{} \\
\mbox{} \ \ \ \ \ \dotfill \mbox{} \\
\mbox{} \ \ \ \ \ \dotfill \mbox{} \\
\mbox{} \ \ \ \ \ \dotfill \mbox{} \\
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Please include a check or money order for \$75.00\ as an advance deposit
to hold your reservation, or use your MasterCard or Visa to guarantee your
room:
Payment method: \hfill $\Box$ MasterCard \hfill $\Box$ Visa \hfill $\Box$ Check
\\
Credit card \#: \hrulefill \\
Expiration date: \hrulefill \\
Signature: \hrulefill \\
\mbox{} \hrulefill \mbox{} \\
Phone the hotel or mail this reservation form to:
\begin{itemize}
\item[]
Red Jacket Mountain View \\
Route 16 \\
North Conway, NH 03860 \\
Phone: 800/R--JACKET (800/752--2538) \\
Outside US and Canada: 603/356--5411 \\
fax: 603/356-3842
\end{itemize}
\vspace{0.3cm}
{\em Cutoff date.} The block of rooms will be released on May 13, 1991, and
reservations cannot be guaranteed after that time.
{\em Cancellations.} If you are not able to attend the conference, the
hotel asks for notice of cancellation by phone.
{\em Method of Payment.} The Red Jacket honors personal checks, company
checks, MasterCard, or Visa. Checks should be in U.S. dollars.
\newpage
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\begin{center}
{\normalsize\bf Conference Information}
\end{center}
{\bf Location:\ \ }
The {\em 7th ACM Symposium on Computational Geometry} will be held
in North Conway, New Hampshire at the Red Jacket Mountain View Inn.
North Conway is a resort town on the edge of the White Mountain National
Forest. The hotel is located on a 25 acre hilltop site, with a view of
Mount Washington, the highest peak in New England.
The area is best known for its mountains and outdoor activities.
It has hundreds of hiking trails, ranging from strolls by ponds
and waterfalls to strenuous hikes up mountain peaks to cliffs frequented
by technical rock climbers. The easy way to ``climb'' a mountain is to take
the auto road or cog railway to the top of Mount Washington. Canoes can be
rented on the nearby Saco River. The hotel has tennis courts and indoor
and outdoor pools, and there are golf courses in the town.
Family attractions in the area include covered bridges, the Conway
Scenic Railroad, Heritage New Hampshire, Storyland, alpine slides, water
slides, and amusement parks. Bargain hunters will find
dozens of outlet stores in the area.
%\vspace{2mm}
{\bf Excursion and Clambake:\ \ }
The excursion will be a trip up Mt. Attitash or one of the other
local mountains. Refreshments will be served at the top, followed by a
lobster clambake at the hotel. (Chicken will be available
for those who would prefer it to lobster, and vegetarian and
kosher alternatives will be provided.) If the weather is bad on Monday
the excursion and clambake will be moved to
Tuesday and the last session of talks scheduled for Tuesday will be moved
to Monday.
%\vspace{2mm}
{\bf Transportation:\ \ }
One drawback to being in the mountains rather than a city is that
transportation can be more complicated. To help you with arrangements, Travel
Agents International, a local travel agent,
has been selected as the conference travel agent. They may be contacted at:
\begin{itemize}
\item[]
Travel Agents International \\
P.O. Box 3303 \\
North Conway, NH 03860 \\
800/537--3040 (US outside of NH) \\
800/833--3037 (Canada) \\
603/356--5400 (otherwise)
\end{itemize}
The nearest major airport is the Portland International Jetport in Portland,
Maine, which is serviced by United, USAir, Delta, and Continental, with
commuter connections on Northwest.
It is 60 miles from the hotel (1 hour 15 min. driving time). Other options
include Manchester Airport in Manchester, New Hampshire (110
miles, 2 hours 30 min.) and Logan International Airport in Boston, MA
(140 miles, 3 hours).
Travel Agents International has negotiated special
conference airfares. They can take 5\% off of any fare, even the supersaver
fares. For those who cannot meet the restrictions for supersaver fares,
Travel Agents International can get 45\% discounts off unrestricted coach
fares. These tickets must be purchased at least 14 days in advance through
their office. The lowest fares have limited availability.
The most flexible option is to fly into one of these airports and rent a car.
The major advantage is that you then have a car
to drive around the area during the conference.
Travel Agents International
has obtained special conference rates with Thrifty Car Rental out of Portland:
\begin{tabular}{lrr}
{\bf Car Type} & Daily & Weekly \\
Subcompact & \$23.99\ & \$119.99\ \\
Compact & \$25.99\ & \$129.99\ \\
Midsized & \$27.99\ & \$139.99\ \\
Full sized & \$31.99\ & \$159.99\ \\
Luxury & \$39.99\ & \$199.99\ \\
\end{tabular}
For those who would prefer not to rent a car, Travel Agents International is
willing to coordinate ground transportation. One-way taxi fare from Portland
is \$60. By booking people on taxis, vans, or small buses, Travel Agents
International expects to get the price down to \$25-50 per round trip. They
suggest booking airplane tickets through them as well as ground transportation,
so that they can cluster arrivals and reduce ground transportation fares
as much as possible.
%\vspace{1mm}
{\bf Driving Directions:\ \ }
The ``main street'' of North Conway is US Rt. 302 / NH Rt. 16.
The Red Jacket is on the east side of this highway at the top of a hill, about
1 mile south of the North Conway green and about 3 miles north of the
intersection of 302 with 16.
{\bf From Portland Airport:\ \ }
Get directions to Stroudwater St. at the rental agency. Follow Stroudwater St.
into Westbrook. Turn left at Dunkin Donuts and take 25 West to 113 (15 miles).
Bear right on 113 and follow it 30 miles to Fryeburg. At the Monument in
Fryeburg turn left onto 302. Follow 302 into North Conway, and turn
right to join 16 at the Burger King. The Red Jacket is on the right after
three miles. (60 miles, 1 hour 15 min.)
{\bf From Boston, MA:\ \ }
Take Interstate 95 North to the Spaulding Turnpike to Rt. 16 North. (140
miles, 3 hours.)
{\bf From Hartford, CT:\ \ }
Take Interstate 86 to Interstate 90 (Mass Pike), one exit to Interstate 290
to Interstate 495 to Interstate 95 North to the Spaulding Turnpike to Rt. 16
North. (235 miles, 5 hours)
{\bf From Montreal:\ \ }
Take Canadian Interstate 10 East to 55 South to US Interstate 91 South to
Interstate 93 South (at St. Johnsbury) to Rt. 302. (235 miles, 5 hours)
{\bf From New York:\ \ }
Take Interstate 95 to Interstate 91, and then as for Hartford. (325 miles,
7 hours)
%\vspace{2mm}
{\bf Weather:\ \ }
Weather in this mountainous region is quite variable.
Expect daytime temperatures in the 70's and 80's. Evening temperatures
could be much cooler, possibly in the upper 40's. Bring a
jacket or sweater! Rain is possible, so a raincoat or umbrella is
important. Mountain tops can be quite breezy and much cooler than the valleys,
so a hat, sweater, and windbreaker might be useful for the excursion.
{\bf Additional Information:\ \ } Scot Drysdale, Dept. of Math and
C.S., Dartmouth College, Hanover, NH 03755. Tel: 603/646--2101.
Email: {\em scot.drysdale@dartmouth.edu}
\newpage
\begin{center}
{\normalsize\bf Program}
\end{center}
\parskip=4pt
\parindent=0pt
{\normalsize\bf Sunday, June 9, 1991}
Reception 7:30--10:00 pm, New Hampshire room, Red Jacket.
\vskip 10pt
{\normalsize\bf Monday, June 10, 1991}
{\bf Session 1: 8:30--9:50 am}
{\bf Chair:} Emo Welzl, {\sf Freie Universit{\"a}t Berlin}
\begin{description}
\item[8:30]
{\it Efficient Partition Trees.}
Ji\v{r}\'{\i} Matou\v{s}ek,
{\sf Charles University}
\item[8:50]
{\it Counting Circular Arc Intersections.}
Pankaj Agarwal,
{\sf Duke University,}
Micha Sharir,
{\sf Tel Aviv and New York University}
\item[9:10]
{\it Efficient Ray Shooting and Hidden Surface Removal.}
Mark de Berg,
{\sf Utrecht University,}
Dan Halperin,
{\sf Tel Aviv University,}
Mark Overmars, Jack Snoeyink, Marc van Kreveld,
{\sf Utrecht University}
\item[9:30]
{\it Efficient Hidden Surface Removal for Objects with Small Union Size.}
Matthew Katz,
{\sf Tel Aviv University,}
Mark Overmars,
{\sf Utrecht University,}
Micha Sharir,
{\sf Tel Aviv University}
\end{description}
{\bf Coffee Break 9:50--10:20 am}
{\bf Session 2: 10:20--12:00 am}
{\bf Chair:} Frank Dehne, {\sf Carleton University}
\begin{description}
\item[10:20]
{\it Intersection Queries for Curved Objects.}
Pankaj Agarwal,
{\sf Duke University,}
Marc van Kreveld, Mark Overmars,
{\sf Utrecht University}
\item[10:40]
{\it Shortest Path Queries in Rectilinear Worlds of Higher Dimension.}
Mark de Berg, Marc van Kreveld,
{\sf Utrecht University,}
Bengt Nilsson,
{\sf Alberts-Ludwigs Universit{\"a}t}
\item[11:00]
{\it Dynamization of the Trapezoid Method for Planar Point Location.}
Yi-Jen Chiang, Roberto Tamassia,
{\sf Brown University}
\item[11:20]
{\it Computing Shortest Transversals of Sets.}
Binay Bhattacharya,
{\sf Simon Fraser University,}
Jurek Czyzowicz,
{\sf Universit{\'e} du Qu{\'e}bec {\`a} Hull,}
Peter Egyed, Godfried Toussaint,
{\sf McGill University,}
Ivan Stojmenovic, Jorge Urrutia,
{\sf University of Ottawa}
\item[11:40]
{\it Optimal Algorithms for Some Smallest Intersection Radius Problems.}
Binay Bhattacharya,
{\sf Simon Fraser University,}
Sreesh Jadhav, Asish Mukhopadhayay,
{\sf Indian Institute of Technology,}
Jean-Marc Robert,
{\sf McGill University}
\end{description}
{\bf Lunch Break 12:00--1:45 pm}
{\bf Session 3: Invited Lecture}
\begin{description}
\item[1:45]
{\it Orthogonal Trees.}
H. S. M. Coxeter,
{\sf University of Toronto}
\end{description}
\parskip=3.5pt
{\bf Session 4: 2:45--3:45 pm}
{\bf Chair:} Ricky Pollack, {\sf New York University}
\begin{description}
\item[2:45]
{\it A Pivoting Algorithm for Convex Hulls and Vertex Enumeration
of Arrangements and Polyhedra.}
David Avis,
{\sf McGill University,}
Komei Fukuda,
{\sf University of Tsukuba}
\item[3:05]
{\it Nonoverlap of the Star Unfolding.}
Boris Aronov,
{\sf Polytechnic University, Brooklyn,}
Joseph O'Rourke,
{\sf Smith College}
\item[3:25]
{\it A Generalization of Dehn-Sommerville Relations to Simple Stratified
Spaces.}
Ketan Mulmuley,
{\sf University of Chicago}
\end{description}
{\bf Excursion: Leave from Red Jacket at 4:30 pm} \\
{\bf Clambake: 7:30 pm, Red Jacket.}
If the weather is bad, the excursion and clambake will be moved to Tuesday.
The last Tuesday session and business meeting will be moved to Monday.
Times will remain the same.
\vskip 10pt
{\normalsize\bf Tuesday, June 11, 1991}
{\bf Session 5: 8:30--9:50 am}
{\bf Chair:} Mike Goodrich, {\sf Johns Hopkins University}
\begin{description}
\item[8:30]
{\it Randomized, Multidimensional Search Trees.}
Ketan Mulmuley,
{\sf University of Chicago}
\item[8:50]
{\it Dynamic Point Location in Arrangements of Hyperplanes.}
Ketan Mulmuley, Sandeep Sen,
{\sf University of Chicago}
\item[9:10]
{\it A Simple On-line Randomized Incremental Algorithm for
Computing Higher Order Voronoi Diagrams.}
Franz Aurenhammer, Otfried Schwarzkopf,
{\sf Freie Universit{\"a}t Berlin}
\item[9:30]
{\it Randomized Parallel Algorithms for Trapezoidal Diagrams.}
Kenneth Clarkson,
{\sf AT\&T Bell Laboratories,}
Richard Cole,
{\sf New York University,}
Robert Tarjan,
{\sf Princeton University}
\end{description}
\parskip=3pt
{\bf Coffee Break 9:50--10:20 am}
{\bf Session 6: 10:20--12:00 am}
{\bf Chair:} Chee Yap, {\sf New York University}
\begin{description}
\item[10:20]
{\it On the Convex Hull of the Integer Points in a Disc.}
Antal Balog,
{\sf Institute of Advanced Study, Princeton,}
Imre B{\'a}r{\'a}ny,
{\sf Yale University and New York University}
\item[10:40]
{\it The Two Guards Problem.}
Christian Icking, Rolf Klein,
{\sf Universit{\"a}t-Gesamthochschule Essen}
\item[11:00]
{\it Extremal Polygon Containment Problems.}
Sivan Toledo,
{\sf Tel Aviv University}
\item[11:20]
{\it Approximate Matching of Polygonal Shapes.}
Helmut Alt, Bernd Behrends, Johannes Bl{\"o}mer,
{\sf Freie Universit{\"a}t Berlin}
\item[11:40]
{\it The Upper Envelope of Voronoi Surfaces and its Applications.}
Daniel Huttenlocher,
{\sf Cornell University,}
Klara Kedem,
{\sf Tel Aviv University,}
Micha Sharir,
{\sf Tel Aviv and New York University}
\end{description}
{\bf Lunch Break 12:00--1:45 pm}
{\bf Session 7: Invited Lecture}
\begin{description}
\item[1:45]
{\it Minimal Surfaces, Crystals and Norm on $\Re^n$.}
Frank Morgan,
{\sf Institute of Advanced Study, Princeton}
\end{description}
{\bf Session 8: 2:45--3:45 pm}
{\bf Chair:} Kokichi Sugihara, {\sf University of Tokyo}
\begin{description}
\item[2:45]
{\it Multiplicatively Weighted Crystal Growth Voronoi Diagrams.}
Barry Schaudt, Scot Drysdale,
{\sf Dartmouth College}
\item[3:05]
{\it Nearest Neighbor Problems.}
Gordon Wilfong,
{\sf AT\&T Bell Laboratories}
\item[3:25]
{\it Enumerating $k$ Distances for $n$ Points in the Plane.}
Matthew Dickerson,
{\sf Middlebury College,}
Scot Drysdale,
{\sf Dartmouth College}
\end{description}
{\bf Coffee Break: 3:45--4:15 pm}
{\bf Session 9: 4:15--5:15 pm}
{\bf Chair:} Chanderjit Bajaj, {\sf Purdue University.}
In case of bad weather on Monday this session will be
moved to Monday, same time, in exchange for the excursion.
\begin{description}
\item[4:15]
{\it Transitions in Geometric Minimum Spanning Trees.}
Clyde Monma, Subhash Suri,
{\sf Bellcore, Morristown}
\item[4:35]
{\it How to Take Short Cuts.}
Claire Kenyon, Richard Kenyon,
{\sf Ecole Normale Sup{\'e}rieure, Paris}
\item[4:55]
{\it Construction of Multidimensional Spanner Graphs, with Applications
to Minimum Spanning Trees.}
Jeffrey Salowe,
{\sf University of Virginia}
\end{description}
{\bf Business meeting, 8:30--10:30 pm, New Hampshire room.}
If the weather is bad on Monday this meeting will be held on Monday, same
time.
\vskip 10pt
{\normalsize\bf Wednesday, June 12, 1991}
{\bf Session 10: 8:30--9:50 am}
{\bf Chair:} Hiroshi Imai, {\sf University of Tokyo}
\begin{description}
\item[8:30]
{\it Geometric Algorithms for a Minimum Cost Assignment Problem.}
Takeshi Tokuyama, Jun Nakano,
{\sf IBM Tokyo Research Laboratory}
\item[8:50]
{\it On Upward Drawing Testing of Triconnected Digraphs.}
Paola Bertolazzi,
{\sf IASI-CNR, Roma,}
Giuseppe Di Battista,
{\sf Universit{\`a} di Roma}
\item[9:10]
{\it A Packing Problem with Applications to Lettering of Maps.}
Michael Formann, Frank Wagner,
{\sf Freie Universit{\"a}t Berlin}
\item[9:30]
{\it Distance Visibility Graphs.}
Collette Coullard,
{\sf Northwestern University, Evanston,}
Anna Lubiw,
{\sf University of Waterloo}
\end{description}
{\bf Coffee Break 9:50--10:20 am}
{\bf Session 11: 10:20--12:00 am}
{\bf Chair:} Peter Shor, {\sf AT\&T Bell Laboratories}
\begin{description}
\item[10:20]
{\it Walking on an Arrangement Topologically.}
Tetsuo Asano,
{\sf Osaka Electro-Communication University,}
Leonidas Guibas,
{\sf MIT and DEC Systems Research Center,}
Takeshi Tokuyama,
{\sf IBM Tokyo Research Laboratory}
\item[10:40]
{\it On the Sum of Squares of Cell Complexities in Hyperplane
Arrangements.}
Boris Aronov,
{\sf Polytechnic University, New York,}
Ji\v{r}\'{\i} Matou\v{s}ek,
{\sf Charles University,}
Micha Sharir,
{\sf Tel Aviv and New York University}
\item[11:00]
{\it On the Complexity of a Single Cell in Certain Arrangements
of Surfaces in 3-space.}
Dan Halperin,
{\sf Tel Aviv University}
\item[11:20]
{\it Arrangements of Segments that Share Endpoints: Single Face Results.}
Esther Arkin,
{\sf Cornell University,}
Dan Halperin, Klara Kedem,
{\sf Tel Aviv University,}
Joseph Mitchell,
{\sf Cornell University,}
Nir Naor,
{\sf Tel Aviv University}
\item[11:40]
{\it Numerical Stability of Algorithms for Line Arrangements.}
Steven Fortune,
{\sf AT\&T Bell Laboratories,}
Victor Milenkovic,
{\sf Harvard University}
\end{description}
{\bf Lunch Break 12:00--1:30 pm}
{\bf Session 12: 1:30--2:50 pm}
{\bf Chair:} Herbert Edelsbrunner, {\sf University of
Illinois at Urbana-Champaign}
\begin{description}
\item[1:30]
{\it Polynomial-size Nonobtuse Triangulation of Polygons.}
Marshall Bern,
{\sf XEROX Palo Alto Research Center,}
David Eppstein,
{\sf University of California, Irvine}
\item[1:50]
{\it Crossing Families.}
Boris Aronov,
{\sf Polytechnic University, Brooklyn,}
Paul Erd{\"o}s,
{\sf Hungarian Academy of Sciences,}
Wayne Goddard, Daniel Kleitman, Michael Klugerman,
{\sf MIT,}
J{\'a}nos Pach,
{\sf Hungarian Academy of Sciences,}
Leonard Schulman,
{\sf MIT}
\item[2:10]
{\it Optimality of the Delaunay Triangulation in $R^d$.}
V. T. Rajan,
{\sf IBM Watson Research Center}
\item[2:30]
{\it Triangulation and CSG Representation of Polyhedra with
Arbitrary Genus.}
Tamal Dey,
{\sf Purdue University}
\end{description}
\newpage
Drysdale \\
Dept. of Mathematics and Computer Science \\
Dartmouth College \\
Hanover, NH 03755
\end{document}