Amygdala Index

Robert P. Munafo, 2023 Aug 2.

This is a listing of articles in the Amygdala newsletter by Rollo Silver. Each issue starts with a link to the issue on archive.org, where you can read it in your browser or download in PDF or other formats.

Issue #0a 19861121

First Words

Contributions and Publication

Color Photos

Notation: discusses ways to specify the coordinates of a rectangular view, with a preference for center/size; defines "magnification" as 1/r where r is the radius of the largest circle that fits within the rectangle.

Terminology: A brief paragraph defining iterates (with the same z_n indexing as here) and dwell

Speedup: Discusses the use of integer math and orbit detection by Floyd's method (RHOP algorithm), and teases an "enormous" speedup method.

Movies & Videos

Contributions

Bibliography: Includes the Scientific American article, Mandelbrot's book, The Beauty of Fractals.

Subscription

Products: lists ARTMATRIX

Plotting ℳ

Issue #1a 19870209

Apology: The delay is because I was trying to do lots of color pictures

The Amygdalan Sects: The fictional story, reprinted here.

Complex Numbers: The Basics

Speedup? An Exchange

Dwell: An Assembler Program: 68000 code using fixed-point math, with 3 bits to the left and 29 bits to the right of the binary point

Review: "On Growth and Form"

Bibliography: About 20 additional citations

Issue #2 198703

The Slide: The John Dewey Jones Minibrot

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Circulation

Issue #3 198704

The Slide

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Circulation

Issue #4 198705

The Logo

Exploring the Interior of ℳ

Notation

Terminology

Tutorial: Functions; Polynomials

Dr. Carl Spring Replies (fiction, follows "The First Encounter" story)

Mariani's Algorithm: Describes the Mariani-Silver algorithm.

Mariani's Algorithm Modified

"Eat My Dust!"

Letters

Bibliography

Authors

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Circulation

Flyer 198706

Amygdala

The Amygdalan Sects

The Slide

Complex Numbers: The Basics

A Journey to the West

Bibliography

Issue #5 198707

A Mandelbrot Machine: describes a custom-built coprocessor using two Weitek 1264 chips, running at 16 MFLOPs single-precision or 8 MFLOPs double (IEEE 64-bit).

A Journey to the West

Tutorial: Mandelbrot Polynomials: the lemniscates

Does the Mandelbrot Set Contain Intelligent Life?

Fractal Software Reviews

Letters

Questions

Bibliography

Foreign Collections

Erratum

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Circulation

Issue #6 198708

Color Slide Supplement: Installment One

The Farside - The Mandelbrot Set on the HP 28C

Plotting the Mandelbrot Set: An Increase in Efficiency: Another version of the Mariani-Silver algorithm, with pseudocode

Mandelbrot Machine Design

Bibliography

"Complex Analysis"

Letters

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Circulation

Issue #7 19871101

MCI Mail

Slides (At Last!)

Cosmology and the Mandelbrot Set by Jonathan Dickau: Describes a modified atom domains rendering based on ending the iteration as soon as three iterates in a row satisfy |z_n|<|z_n-1|<|z_n-2|, then using n as the dwell to determine a colour; then describes ways in which the resulting image is conceptually similar to certain qualities of the cosmology of western science (astrophysics), all seen through imagined interpretations of popular accounts. (Similar to the "Time and ..." article in this same issue)

Mandelbrot Programs for Amiga

A Monochromatic Theorem: A complete proof that any rectangle (not containing all of the Mandelbrot set) has the same range of dwell values among the points in its boundary as exist for the points of its interior. This is shown to follow from: the lemniscates are closed curves that are not mutually intersecting except at z=-2, and the Mandelbrot Set (being the interior of the limit of the lemniscates) is connected.

Time and the Mandelbrot Set by Ronald A. Lusk: Relates Mandelbrot images in a qualitative way to popularised concepts of astrophysics. (Similar to the "Cosmology and ..." article in this same issue)

Letters

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Circulation

Issue #8 19880106

Correction

Full Moon, October 1987 (poem)

Noble Work

Author!

The Slides

Ken Philip's Slide Notes

Escape Radius

About Mandelcolor (describing its charitable beneficiary)