Update History Since April 2001

Prehistory (incomplete)

16^th February 2000: Metatrapezoidal snowflake page written.
16^th February 2000: stingray fractal page (since subsumed into t-tetramer page) written.
22^nd February 2000: Metatrapezia page written.
20^th June 2000: t-tetramer page written.
21^st June 2000: s-polymer page written.
25^th June 2000: cyclomer, fudgeflake, cruciomer and flowsnake pages written, including higher order fudgeflakes, cruciomers and flowsnakes.
26^th June 2000: zigzag odd polymers page announced on news:sci.fractals.
1^st July 2000: dimers page written, covering sqrt(2):1 parallelogram, right isoceles triangle, Harter-Heighway dragon, and twindragon, dirusus and scorpion.
2^nd July 2000: z-homeolineomer page (since subsumed into homeolineomer page) written.
10^th July 2000: fudgeflake page updated.
12^th July 2000: Z-pentamer page written.
12^th July 2000: isotrianguloid, allotrianguloid and cross trianguloid pages written.
6^th March 2001: homeolineomer page replaces z-homeolineomer page.

Update History (since April 2001)

20^th April 2001: reorganised this page, preparatory to creating sub-index files.
20^th April 2001: dimers, corrected and extended list of 2 element rep-tiles.
20^th April 2001: homeolineomers, images revised as part of rework of dimers.
20^th April 2001: cyclomers, corrected information on tilings, and restructured page.
24^th April 2001: first draft of rep-tiles page written.
26^th April 2001: corrected information on tiling of allotrianguloids.
26^th April 2001: corrected information on tiling of crosstrianguloids.
26^th April 2001: added images of z₀-homeolineomers (rep-n rectangles) and trans-homeolineomers to homeolineomers page.
26^th April 2001: reinserted image of demihexagon (triamond) on metatrapezia page.
26^th April 2001: first draft of "Index of Named Rep-tiles" page written.
27^th April 2001: first draft of other tiling IFSs page written.
28^th April 2001: finite vs infinite length boundary added to list of possible classificatory properties for rep-tiles.
28^th April 2001: cyclomer teardrops page written.
28^th April 2001: Koch teardrops page written.
29^th April 2001: spiral hepta-hextal page written.
30^th April 2001: "7+6" construction added to Koch snowflake page.
30^th April 2001: page added for Gosper's frozen teardrop.
4^th May 2001: page added for Cross of Lorraine fractals.
4^th May 2001: revised terminology for polymers.
4^th May 2001: glossary updated.
4^th May 2001: first draft of polyiamonds page written.
4^th May 2001: polyabolos added to list of classes of figures which include rep-tiles.
4^th May 2001: uploaded c3-hexagonoid, c6-hexagonoid, starflake and terhexagonoid pages.
5^th May 2001: iso-fractal technique documented.
8^th May 2001: revision of sources and references for dimers.
8^th May 2001: first draft of polyominos page written.
9^th May 2001: rep-numbers for L-triomino revised.
9^th May 2001: alternative names for I- and O-polyominos added.
16^th May 2001: mapleleaf tile, and 2 other tiling fractals added.
21^st May 2001: affine technique documented.
24^th May 2001: composition techniques documented.
30^th May 2001: small changes made to rep-tiles and dimers pages.
31^st May 2001: added heterolineotrimer (terdragon, terlock, tergriffin, terjigs, etc.) page.
1^st June 2001: added unit cell for filigree trimer I to heterolineotrimer page.
1^st June 2001: added attractors and unit cells for filigree trimers II and III, and for the trans equivalents of the filigree trimers to heterolineotrimer page.
3^rd June 2001: added page for Gosper's continuum frac-3-tile.
7^th June 2001: changed links to R. William Gosper's pages to point to his new web site.
15^th June 2001: minor modifications to polyominos page.
25^th June 2001: minor modifications to rep-tiles page.
25^th June 2001: added page for caterpillar and concertina polymers.
27^th June 2001: added page for assorted trimers.
29^th June 2001: revised page for Gosper's continuum frac-3-tile.
29^th June 2001: metrapezia, added link to techniques, and removed incorrect (incomplete) list of polygonal rep-tiles
1^st July 2001: added page for Rauzy Fractal
1^st July 2001: added link to Walter Schraa's page for assorted trimers.
3^rd July 2001: Rauzy Fractal, added more details.
3^rd July 2001: added page for minimal Pisot tile.
8^th July 2001: small additions to glossary and index.
8^th July 2001: reworked classification of rep-tiles and other tiling fractals.
12^th July 2001: Rauzy Fractal, reworked, added more images.
12^th July 2001: DemiRauzy Fractal page added, with 5 element demiRauzy fractals.
17^th January 2002: minimal Pisot tile, alternative derivation of characteristic angle added
18^th January 2002: added page for 2-element ir-reptiles
4^th March 2002: added more links to rep-tiles page.
17^th April 2002: added page for pseudo-terdragon.
18^th April 2002: added page for m-pseudo-terdragons.
18^th April 2002: added page for demi-pseudo-terdragons
18^th April 2002: added page for m-demi-pseudo-terdragons
18^th April 2002: added page for demi-m-demi-pseudo-terdragons
21^st April 2002: added more octiamonds
22^nd April 2002: updated reference to Karl Dahlke's site on polyomino page
23^rd April 2002: added alternative rep-4 version of P-polyomino, and revised colouring of polyomino images
27^th April 2002: added page for golden tiles
18^th May 2002: added page for tiles associated with the 3rd unit cubic Pisot number with complex conjugates
21^st May 2002: added 4^th 3-element tile associated with the 3rd unit cubic Pisot number with complex conjugates
12^th June 2002: added page for cyclic (c4) octopletals and derived tiles.
11^th October 2002: added page for a 4-element tile associated with the 8rd unit cubic Pisot number with complex conjugates.
15^th October 2002: added gallery of 3-element tiles associated with the 4th unit cubic Pisot number with complex conjugates.
14^th May 2005: corrected sign error on page for 8rd unit cubic Pisot number with complex conjugates, and added 4 tiles with similar constructions