Complex Numbers (Book)

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Complex Numbers

Complex Numbers

A complex number is expressed in the standard form a + bi, where a and b are real numbers and i is defined by i^2 = -1 (that is, i is the square root of -1). For example, 3 + 2i is a complex number.

The bi term is often referred to as an imaginary number (though this may be misleading, as it is no more "imaginary" than the symbolic abstractions we know as the "real" numbers). Thus, every complex number has a real part, a, and an imaginary part, bi.

Complex numbers are often represented on a graph known as the "complex plane," where the horizontal axis represents the infinity of real numbers, and the vertical axis represents the infinity of imaginary numbers. Thus, each complex number has a unique representation on the complex plane: some closer to real; others, more imaginary. If a = b, the number is equal parts real and imaginary.

Very simple transformations applied to numbers in the complex plane can lead to fractal structures of enormous intricacy and astonishing beauty.

http://www.ddewey.net/mandelbrot/

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10 Most Recent Blog Comments:

Write_Mikey_Write!

a day ago
In response to "Global Domination"

A little girl wearing a Hello Kitty shirt in Middle-of-Nowhere, Siberia will certainly make you wonder how it got there. My grandson has a souvenir t-shirt with a Terex 33-19 "Titan" on it. When it was built in 1973, the Titan was the largest, highest payload capacity truck ever built, a title it held for 25 years. The thing is, the truck on that t-shirt is on display in Sparwood, BC, Canada - over 1000 miles from here, and his mom got the shirt at a local thrift store. Makes me wonder.

Oh, yeah - I thought 'Schrödinger's Hello Kitty' was funny, too.

1 Like

Adherennium Plotting something

a day ago
In response to "Global Domination"

For whatever warped reason, 'Schrödinger's Hello Kitty' has tickled my funny bone.

3 Like

Brandiwyn🎶

Nov 12, 2024 at 10:50am
In response to "Blond Man's Bluff"

That's interesting about the two spellings of blonde. I always thought blonde referred to the person and blond referred to the hair. But I never bothered to look it up, So you've catered to my lazy today.

3 Like

Kåre เลียม Enga

Nov 9, 2024 at 1:02pm
In response to "It Was a Dark and Starry Night"

Ah... but why did he see those swirls when many of us don't? A totally different discussion... out of thin air... which is a frozen fog today when I gaze out the window.

Humans have great skills of observation; some of us extraordinary skills. Is The Scream depictive or evocative? 😱

Turkey DrumStik

Nov 9, 2024 at 11:04am
In response to "It Was a Dark and Starry Night"

Frankly, I'm more surprised to see reasonably good reporting from CNN. I'd given up on their ability to rein in their tendency toward loaded speech.

2 Like

JayNaNoOhNo

Nov 8, 2024 at 12:00pm
In response to "Bungalow Bash"

For the love of God, what did I just read? That is by far the worst use case of a bungalow I've ever seen, and a fundamental misunderstanding of the value of front porches—and the size of bungalows.

Was this his point? Nope, I know what his point was. For a guy so worried about presentation, he certainly undercut his own arguement.

1 Like

Turkey DrumStik

Nov 8, 2024 at 9:47am
In response to "Bungalow Bash"

"People don't change their minds on the internet. They usually do that in books, battlefields, or not at all.

Yeah, that's a little bleak."

Bleak and also inaccurate.

1 Like

Kåre เลียม Enga

Nov 7, 2024 at 10:19pm
In response to "Past and Future Intents"

I must live in the present. In the past I daydreamed a lot... probably to escape the bruises of reality; however, I need to be more aware crossing streets or even how I get out of bed (no rapid movements without thinking of consequences).

I can envision a future more peaceful than the present because this time-and-place isn't the only "present" that's ever existed, and I do try to see the larger view (emphasis on 'try').

1 Like

Lilli 🧿 ☕

Nov 7, 2024 at 10:58am
In response to "Past and Future Intents"

If the aforementioned exercises don't help; there's still liquor.

3 Like

Turkey DrumStik

Nov 6, 2024 at 10:22am
In response to "Lo!"

Not gonna lie I need the holiday season chatter.

October 20, 2019 at 12:25am

#968145

Today's Vocabulary List

http://mentalfloss.com/article/502463/15-obscure-words-everyday-feelings-and-emo...

I've been learning French, but that doesn't mean I can stop learning English. Or anything else for that matter. And when it comes to describing emotions, I can use all the help I can get.

15 Obscure Words for Everyday Feelings And Emotions

Fortunately for me, some of these are actually from French, so... win?

I'll just highlight a few of my favorites, none of which are French.

1. Croochie-Proochles

The superb Scots dialect word croochie-proochles means the feeling of discomfort or fidgetiness that comes from sitting in a cramped position (like, say, on an airplane).

Honestly, the list could have stopped here and I'd be happy. I mean, can you come up with a better word than croochie-proochles? For anything? No? I didn't think so.

11. Lonesome-Fret

That feeling of restlessness or unease that comes from being on your own too long is lonesome-fret, an 18th/19th century dialect word defined as “ennui from lonesomeness” by the English Dialect Dictionary.

Huh... never felt that, myself. Now I want to be on my own long enough to see if I experience it. Bet I won't.

12. Fat-Sorrow

“Sorrow alleviated by riches”—or, put another way, sadness alleviated by material things—is fat-sorrow. It’s a term best remembered from the old adage that “fat sorrow is better than lean sorrow.”

This seems like one of those phrases that would sound better in French, or at least Latin. Douleur-gras, maybe? French does almost everything backwards. Or, maybe English does. Whatever. Anyway, I've been saying for years that I'd rather be rich and unhappy than poor and happy, and this describes that pretty well.

14. Crapulence

When the word hangover just won’t do it justice, there’s crapulence. As the OED defines it, crapulence is a feeling of “sickness or indisposition resulting from excess in drinking or eating.”

And this is the one entry on the list that I was already aware of - for reasons that should be obvious to regular readers.

3 Like • Comment • View 1 comment

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