Ernest Irving Freese's Geometric Transformations: the Man, the Manuscript, the Magnificent Dissections! by Greg Frederickson

Most recent additions to these updates

August 2017 - Further motivation for youthful Freese's travels
August 2017 - Swinging the pieces in Figure I158a
December 2017 - Photo of Freese's first wife Philippa, and a bungle-ode
December 2017 - Paul Peter Kiessig's early career
January 2018 - Gavin Theobald's improved icosagon to square
January 2018 - Misplaced Commas
January 2018 - Missing page reference for "translational dissection"
February 2018 - Typo on page 142
February 2018 - Gavin Theobald's further improvements
February 2018 - Text of Freese's book on perspective projection
February 2018 - A square to one isosceles triangle and also to another
February 2018 - Equiareal versus congruent triangles
March 2018 - Gavin Theobald's improved dissection for Figure I155
March 2018 - Missing page reference for "translational dissection"
May 2018 - Plate 178 can be made translational
June 2018 - Typo on page 126
June 2018 - Dissection in Figure I95c is not translational
June 2018 - Minimality of some dissections in Plate 76
July 2018 - A translational dissection for the square-sum class
July 2018 - Text of Freese's book on prespective projection and list of his articles and columns
July 2018 - Harry Lindgren's dissection of two dodecagons to one is translational
August 2018 - Hingeable dissection of an equilateral triangle to a Greek Cross
August 2018 - Hingeable dissection of ten pentagons to a decagonal ring
August 2018 - Figure I126 is suitably translational
September 2018 - Author of the Interlocks manuscript
September 2018 - A translational dissection of three octagons to one with few pieces
September 2018 - Prepositional Illogic
October 2018 - Freese's Note on Plate 64
November 2018 - Translational dissection of a dodecagram to a hexagon
November 2018 - Missing references for stellated polygons
November 2018 - Missing references for co-polygrams
December 2018 - Capsized by captions!
January 2019 - Recognition of Freese's 1934 article, "Geometry of the human figure"
January 2019 - Plate 161 can be made swing- and twist-hingeable
January 2019 - Kiessig's Quote from Sir Walter Scott
September 2019 Announced Result by Abbott, Abel, Charlton, Demaine, Demaine, and Kominers

All updates, including typos, by chapter

1. The Rich History of Geometric Dissections
2. The "Wild Adventures" of Ernest Freese
3. Techniques, Special Properties, Hardness
4. Freese's Title Page and Index
5. Isosceles Triangles
6. Equilateral Triangles
7. Squares, Crosses, Rectangles
8. Pentagons and Pentagrams
9. Hexagons and Hexagrams
10. Octagons and Octagrams
11. Enneagons (Nonagrams)
12. Decagons and Decagrams
13. Dodecagons and Dodecagrams
14. Many-sided Polygons
15. Miscellaneous Figures
16. More Crosses
17. More Miscellaneous Figures
18. Mixed Polygons to One
19. Special Triangles
20. From the Past, Into the Future

Copyright 2019, Greg N. Frederickson.
Permission is granted to any purchaser of Ernest Irving Freese's `Geometric Transformations': the Man, the Manuscript, the Magnificent Dissections! to print a copy of this page for his or her own personal use.

Last updated February 5, 2019.