Update History Since April 2001
Prehistory (incomplete)
- 16th February 2000:
Metatrapezoidal snowflake page written.
- 16th February 2000: stingray fractal page
(since subsumed into t-tetramer page) written.
- 22nd February 2000:
Metatrapezia page written.
- 20th June 2000:
t-tetramer page
written.
- 21st June 2000: s-polymer page written.
- 25th June 2000: cyclomer, fudgeflake,
cruciomer and flowsnake pages written, including higher order
fudgeflakes, cruciomers and flowsnakes.
- 26th June 2000: zigzag odd polymers page announced on news:sci.fractals.
- 1st July 2000: dimers page written, covering sqrt(2):1 parallelogram,
right isoceles triangle, Harter-Heighway dragon, and twindragon, dirusus and
scorpion.
- 2nd July 2000: z-homeolineomer page
(since subsumed into homeolineomer page)
written.
- 10th July 2000: fudgeflake page updated.
- 12th July 2000: Z-pentamer page written.
- 12th July 2000:
isotrianguloid,
allotrianguloid and
cross trianguloid pages written.
- 6th March 2001:
homeolineomer page replaces
z-homeolineomer page.
Update History (since April 2001)
- 20th April 2001: reorganised this page,
preparatory to creating sub-index files.
- 20th April 2001: dimers, corrected and extended list of 2 element
rep-tiles.
- 20th April 2001:
homeolineomers, images revised as part of
rework of dimers.
- 20th April 2001:
cyclomers, corrected information on tilings, and
restructured page.
- 24th April 2001: first draft of
rep-tiles page written.
- 26th April 2001: corrected information on
tiling of allotrianguloids.
- 26th April 2001: corrected information on
tiling of crosstrianguloids.
- 26th April 2001: added images of
z0-homeolineomers
(rep-n rectangles) and trans-homeolineomers to homeolineomers page.
- 26th April 2001: reinserted image of
demihexagon (triamond) on metatrapezia page.
- 26th April 2001: first draft of "Index of Named Rep-tiles" page written.
- 27th April 2001: first draft of
other tiling IFSs page written.
- 28th April 2001: finite vs infinite
length boundary added to list of possible classificatory properties for
rep-tiles.
- 28th April 2001:
cyclomer teardrops page written.
- 28th April 2001:
Koch teardrops page written.
- 29th April 2001:
spiral hepta-hextal page written.
- 30th April 2001: "7+6"
construction added to Koch snowflake page.
- 30th April 2001: page added for
Gosper's frozen teardrop.
- 4th May 2001: page added for
Cross of Lorraine fractals.
- 4th May 2001: revised terminology for
polymers.
- 4th May 2001: glossary updated.
- 4th May 2001: first draft of
polyiamonds page written.
- 4th May 2001: polyabolos added to list of
classes of figures which include rep-tiles.
- 4th May 2001: uploaded
c3-hexagonoid, c6-hexagonoid, starflake and terhexagonoid pages.
- 5th May 2001:
iso-fractal technique documented.
- 8th May 2001: revision of sources and
references for dimers.
- 8th May 2001: first draft of
polyominos page written.
- 9th May 2001: rep-numbers for
L-triomino revised.
- 9th May 2001: alternative names for
I- and O-polyominos added.
- 16th May 2001: mapleleaf tile, and 2 other tiling fractals added.
- 21st May 2001:
affine technique documented.
- 24th May 2001:
composition techniques documented.
- 30th May 2001: small changes made to
rep-tiles and dimers
pages.
- 31st May 2001: added
heterolineotrimer (terdragon, terlock,
tergriffin, terjigs, etc.) page.
- 1st June 2001: added unit cell for
filigree trimer I to heterolineotrimer
page.
- 1st 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.
- 3rd June 2001: added page for
Gosper's continuum frac-3-tile.
- 7th June 2001: changed links to R.
William Gosper's pages to point to his new web site.
- 15th June 2001: minor modifications to
polyominos page.
- 25th June 2001: minor modifications to
rep-tiles page.
- 25th June 2001: added page for
caterpillar and concertina polymers.
- 27th June 2001: added page for
assorted trimers.
- 29th June 2001: revised page for
Gosper's continuum frac-3-tile.
- 29th June 2001:
metrapezia, added link to
techniques, and removed incorrect
(incomplete) list of polygonal rep-tiles
- 1st July 2001: added page for
Rauzy Fractal
- 1st July 2001: added link to Walter
Schraa's page for assorted trimers.
- 3rd July 2001: Rauzy
Fractal, added more details.
- 3rd July 2001: added page for
minimal Pisot tile.
- 8th July 2001: small additions to
glossary and index.
- 8th July 2001: reworked classification of
rep-tiles and other tiling
fractals.
- 12th July 2001: Rauzy Fractal, reworked, added more images.
- 12th July 2001: DemiRauzy Fractal page added, with 5 element demiRauzy
fractals.
- 17th January 2002: minimal Pisot tile, alternative derivation of
characteristic angle added
- 18th January 2002: added page for
2-element ir-reptiles
- 4th March 2002: added more links to
rep-tiles page.
- 17th April 2002: added page for
pseudo-terdragon.
- 18th April 2002: added page for
m-pseudo-terdragons.
- 18th April 2002: added page for
demi-pseudo-terdragons
- 18th April 2002: added page for
m-demi-pseudo-terdragons
- 18th April 2002: added page for
demi-m-demi-pseudo-terdragons
- 21st April 2002: added more
octiamonds
- 22nd April 2002: updated reference to
Karl Dahlke's site on polyomino page
- 23rd April 2002: added alternative rep-4
version of P-polyomino, and revised colouring of polyomino images
- 27th April 2002: added page for
golden tiles
- 18th May 2002: added page for tiles
associated with the 3rd unit cubic Pisot number with
complex conjugates
- 21st May 2002: added 4th
3-element tile associated with the 3rd unit cubic Pisot
number with complex conjugates
- 12th June 2002: added page for
cyclic (c4) octopletals and derived tiles.
- 11th October 2002: added page for a
4-element tile associated with the 8rd unit
cubic Pisot number with complex conjugates.
- 15th October 2002: added gallery of
3-element tiles associated with the 4th unit cubic Pisot
number with complex conjugates.
- 14th May 2005: corrected sign error on
page for 8rd unit cubic Pisot number with
complex conjugates, and added 4 tiles with similar constructions
© 2001, 2002, 2005 Stewart R. Hinsley