Squared Squares  Introductory links 

Mathworld Perfect Square Dissections 

Ed Pegg's Math Games  Square Packing 
 Squaring the Square, Honsberger,Waterloo University. 

TILING RECTANGLES WITH SQUARES (FOR DUMMIES) By Melissa Papenfus 
R.L. Brooks, C. A. B. Smith, A. H. Stone and W. T. Tutte 

The Dissection of Rectangles into Squares. (subscription) 

The Trinity Mathematical Society 
Skinner J.D.; Smith C.A.B.; Tutte W.T. 

On the Dissection of Rectangles into RightAngled Isosceles Triangles. 
CAB Smith 
C.A.B. Smith (CABS)

The Story of Blanche Descartes 
In Memoriam, Cedric A B Smith [link to be updated] 
Times Online CAB SMITH Obituary [link to be updated] 
Arthur Stone 

An Interview with Arthur Stone, by W. W. Comfort 
William T Tutte 
BBC: Code Breakers Bletchley Parks lost Heroes (Tutte and Flowers)

Dan Younger's biographical sketch of W.T. Tutte 
William T. Tutte, Dan Younger's remarks 
A review of W T Tutte's 'Graph Theory as I have known it' (PDF) 
A Toast to Matroids by W. T. Tutte 
60 Years in the Nets by W. T. Tutte (audio Realplayer 7) 
W T Tutte CRMFields Institute Prize 
Tutte honored by cryptographic centre, June 17, 1998 
Bill Tutte's role in the programming of the worlds first digital computer  kept Top Secret until recently. It is said Bill Tutte and Tommy Flowers shortened WWII by 2 years 
CodeBreakers: Bletchley Park's Lost Heroes  BBC Two. The story of Bill Tutte and Tommy Flowers. The two mystery men who uncovered Hitler's secret code and helped win WW2, then disappeared from history. 

During his time at Bletchley Park, Captain Roberts came into contact with several brilliant men. He says, in the great successes of Bletchley Park,
three men played key roles. Alan Turing (who possibly saved Britain by breaking naval Enigma in 1941), Bill Tutte (who broke the Tunny
ciphersystem, helping to shorten the war, as Gen. Eisenhower said: Bletchley decrypts shorten the war by at least two years) and Tommy Flowers
(who designed and built Colossus, the first electronic computer ever, the Founding Father of todays computer world).
17SEP2009: Captain Jerry Roberts visits the Google London office to speak about his time as a code breaker at Bletchley Park during World War 2. This
talk took place as part of the Speakers@Google series, on the 24th August 2009. (1h7m45s) 
1FEB2010: Unsung heroes of IT: The story of Bill Tutte and Tommy Flowers (7m9s) 
Unsung Heroes: The story of Bill Tutte (14m41s) 
2FEB2010: Bletchley's codecracking Colossus 
Colossus reconstructed

27MAY2011: Codecracking machine returned to life (3m12s) The first Tunny machines were built following the work in 1942 of
mathematician Bill Tutte. 

A Brief History of Computing (including Colossus). It mentions DEUCE which I
was shown in 1957 (at English Electric, Kidsgrove near Leicester) by a Mr. Lam from Vietnam who worked there. It also mentions Maurice Wilkes
(19132010) who built EDSAC in 1949: I attended some of his lectures in Cambridge. (Geoffrey Morley) 
W. T. Tutte

The Guardian William Tutte 
William T Tutte  Mathematician 

CJ Bouwkamp 

CJ Bouwkamp en de Squared Squares (Dutch); J Haubrich (PDF) 

AJW Duijvestijn 

ELECTRONIC COMPUTATION OF SQUARED RECTANGLES, AJW Duijvestijn 

In memoriam Arie Duijvestijn (Dutch) 

A. J. W. Duijvestijn publications 

Duijvestijn SPSS and 2x1 Squared Rects order 26 (PDF) 

JD Skinner II 

Uniquely squared squares of a common reduced side and order 1992 

Ian Gambini 

Ian Gambini's 2001 thesis Carres (French) (PDF) 

T.H. Willcocks 

TH Willcocks article on Squaring the Square 2004 

Graph Theory, Enumeration, Generation and Representation of Planar Graphs 

Mathworld: Polyhedral Graph 

Blanche Descartes Review of Bondy and Murty's 'Graph Theory with Applications' 

W.T.TUTTE, A New Branch of Enumerative Graph Theory, 1962 

Enumeration of Polyhedra  Numericana 

Duijvestijn; The number of polyhedral (3Connected Planar) Graphs 

Duijvestijn; Identification of Graphs, Two graphs have the same identification number if and only if they are isomorphic. 

CaGe  Chemical & abstract Graph environment  software with a graphical user interface to produce and view graphs (includes plantri generators) 

plantri  planar graph software (produces many kinds of planar graph, including polyhedral graphs) by Brendan McKay and Gunnar Brinkmann 

Plantrifull. This paper describes plantri’s principles of operation, the basis for its efficiency,
and the recursive algorithms behind many of its capabilities. 

convex polytopes  representations and 3D embeddings 

Bodirsy, Gropl, Johannsen and Kang; cnet enumeration 

ASYMPTOTIC ENUMERATION AND LIMIT LAWS OF PLANAR GRAPHS OMER GIM´ENEZ AND MARC NOY 

Bodirsky; 10 Steps to Counting Unlabeled Planar Graphs: 20 Years Later 

Fusy; Decomposition and enumeration of planar graphs 

A106651 c(n) = number of cnets on n vertices. 

A000109 Number of simplicial polyhedra with n nodes; simple planar graphs with 3n6 edges; maximal simple planar graphs; 3connected planar triangulations; 3connected triangulations of the sphere; 3connected cubic planar graphs. 

A000944 Number of polyhedra (or 3connected simple planar graphs) with n nodes. 

A049337 Triangle read by rows: T(n,k) = number of 3connected planar graphs (or polyhedra) with n >= 1 nodes and 0<=k<=C(n,2) edges. 

Squared Rectangles, and Variations on Square and Rectangle tiling 

Squared rectangle calculator. Squared rectangles colored in four colors. 

SQUARE THE SQUARE, Problem, game and general theorem, Karl Scherer 

Robert Haramoto  Simple Perfect Squared Rectangles 

Prolog III, Alain Colmerauer  Squaring Rectangles p 2531(PDF) 

Squaring Rectangles and VLSI layouts  Prof WaiKai Chen 

Cannon, Floyd and Parry's paper  Squared rectangles & Riemann mappings(PDF) 

Global Constraint Catalog  Squared squares 

Beentjes squared rectangle method(PDF) 

CSLA: Silvia Heubach  Tiling Rectangles with Squares 

Cannon, Floyd and Parry's software for squared rectangles and circle packing 

Shastry  Squared rectangle algorithms(PS) 

The dissection of rectangles, cylinders, tori and Mobius strips into squares ; S J Chapman (subscription only) 

Eric Friedman's Math Magic  has many variations on the square packing theme 

Squared rectangles: A spaceefficient layout for ranked graphics 

Eppstein's Geometry Junkyard Dissections 

Yoshiro Mimura's Page of Square Identities 

Robert Wainwright's Partridge Puzzle Page 

The 7070 Square Puzzle 

Patterns with right angled Isosceles Triangles 

triangle dissections (including integer dissections) 

Proof by David Radcliffe that there are no simple triangled triangles 

Problem 48.? Simple perfect prime squared rectangles 

Joseph Malkevitch Tidbit Geometric Packing 

Dissections of p:q rectangles; Jepsen (PDF) 

Giovanni Resta's Perfect Rectangles 

Squared Square Arty & Crafty 
MATH with my KIDS; Latin Squares, Squared Squares, and Legoed Squares 

Artist Eric Harshbarger's Perfect Square Dissection of the 21 Duijvestijn square in LEGO 

Charles Payan's art  includes the Duijvestijn 112 squared square  Partition (1985) 

Stijn's PostScript fragment 

Rob's Puzzle Page 

Square Deal  Squared Squares in Fabric 

Crafting by Concepts: Fiber Arts and Mathematics  Google Books Result Chapter 7 Perfectly Simple Squaring the Rectangle 

Quilting squared squares  Layers of Meaning 

Bob Mackay has build a wooden cabinet based on Duijvestijn's 21 112x112 squared square. See also with doors and drawers open and the front view (closed up) 

Stephen Middlehall has also designed and built a wooden cabinet based on Zbigniew Moron's 33 x 32 squared rectangle. 

Electrical Network Theory 

Random Walks and Electrical Networks(PDF) 

Electricity is NOT a form of energy!!! 

ECE 201 Electrical Networks I  flash animations and lecture notes 
