Control math

CSGnet Archive CSG2010
1

[From Avery Andrews (2010.03.22 Eastern Oz Daylight Savings)]

Some stuff about control math that Richard Kennaway might have a clue about

http://math.ucr.edu/home/baez/week294.html

(I have a dim inkling about some of it, but very little)/

2

[From Bill Powers (2010.03.22.0903 MDT)]

Avery Andrews (2010.03.22 Eastern Oz Daylight Savings) --

Some stuff about control math that Richard Kennaway might have a clue about

week294

(I have a dim inkling about some of it, but very little)

That put you two up on me; I get neither an inkling nor a dim inkling. It's like hearing aliens from Alpha Centauri talking at first contact, and realizing that while they seem to have learned English, the higher-order thoughts that guide the language are nothing like ours.

Best,

Bill P.

3

[From Richard Kenanway (20100322.1742)]

[From Bill Powers (2010.03.22.0903 MDT)]

Avery Andrews (2010.03.22 Eastern Oz Daylight Savings) --

Some stuff about control math that Richard Kennaway might have a clue about

week294

(I have a dim inkling about some of it, but very little)

Thanks for that reference. I'm aware of Baez's blog but don't follow it.

That put you two up on me; I get neither an inkling nor a dim
inkling. It's like hearing aliens from Alpha Centauri talking at
first contact, and realizing that while they seem to have learned
English, the higher-order thoughts that guide the language are
nothing like ours.

I get a little more from it, but I still feel that I'm gazing up at the clouds around lofty Parnassus.

Despite his mentions of control theory, he hasn't actually got round yet to discussing control systems. I'll try and clamber up some of the foothills before he does.

···

--
Richard Kennaway, jrk@cmp.uea.ac.uk, Richard Kennaway
School of Computing Sciences,
University of East Anglia, Norwich NR4 7TJ, U.K.

4

[From Bill Powers (2010.03.22.1215 MDT)]

Richard Kenanway (20100322.1742) --

BP earlier: That put you two up on me; I get neither an inkling nor a dim
inkling. It's like hearing aliens from Alpha Centauri talking at
first contact, and realizing that while they seem to have learned
English, the higher-order thoughts that guide the language are
nothing like ours.

JRK: I get a little more from it, but I still feel that I'm gazing up at the clouds around lofty Parnassus.

Despite his mentions of control theory, he hasn't actually got round yet to discussing control systems. I'll try and clamber up some of the foothills before he does.

OK, I always figured you were from somewhere like Alpha Centauri, where they speak in tongues and eat math with their porridge. Glad to have an ambassador.

Best,

Bill P.

5

[from Tracy B. Harms (2010-03-22 14:35 Pacific)]

Hi, Richard,

There is a book I’ve heard recommended that I think would be applicable to the math indicated by Baez. It is:

Conceptual Mathematics: A First Introduction by F. William Lawvere, Stephen Hoel Schanuel

···

–
Tracy

On Mon, Mar 22, 2010 at 1:45 PM, Richard Kennaway jrk@cmp.uea.ac.uk wrote:

[From Richard Kenanway (20100322.1742)]

[From Bill Powers (2010.03.22.0903 MDT)]

Avery Andrews (2010.03.22 Eastern Oz Daylight Savings) –

Some stuff about control math that Richard Kennaway might have a clue about

http://math.ucr.edu/home/baez/week294.html

(I have a dim inkling about some of it, but very little)

Thanks for that reference. I’m aware of Baez’s blog but don’t follow it.

That put you two up on me; I get neither an inkling nor a dim

inkling. It’s like hearing aliens from Alpha Centauri talking at

first contact, and realizing that while they seem to have learned

English, the higher-order thoughts that guide the language are

nothing like ours.

I get a little more from it, but I still feel that I’m gazing up at the clouds around lofty Parnassus.

Despite his mentions of control theory, he hasn’t actually got round yet to discussing control systems. I’ll try and clamber up some of the foothills before he does.

–

Richard Kennaway, jrk@cmp.uea.ac.uk, http://www.cmp.uea.ac.uk/~jrk/

School of Computing Sciences,

University of East Anglia, Norwich NR4 7TJ, U.K.

6

[from Tracy B. Harms (2010-03-22 14:42 Eastern)]

The time-stamp on my recent post was inaccurate. I forgot to change my time-stamp program to reflect my new time zone when I moved to Ohio.

Since I’m on that topic, here’s the (newly corrected) J program I use:

csgstamp =: 3 : ‘wdclipwrite ‘’[from Tracy B. Harms (’‘, ‘’ Eastern)]’',~ 6!:0 ‘‘YYYY-MM-DD hh:mm’’ ’

···

–
T

On Mon, Mar 22, 2010 at 2:38 PM, Tracy Harms kaleidic@gmail.com wrote:

[from Tracy B. Harms (2010-03-22 14:35 Pacific)]

Hi, Richard,

There is a book I’ve heard recommended that I think would be applicable to the math indicated by Baez. It is:

Conceptual Mathematics: A First Introduction by F. William Lawvere, Stephen Hoel Schanuel

–
Tracy

On Mon, Mar 22, 2010 at 1:45 PM, Richard Kennaway jrk@cmp.uea.ac.uk wrote:

[From Richard Kenanway (20100322.1742)]

[From Bill Powers (2010.03.22.0903 MDT)]

Avery Andrews (2010.03.22 Eastern Oz Daylight Savings) –

Some stuff about control math that Richard Kennaway might have a clue about

http://math.ucr.edu/home/baez/week294.html

(I have a dim inkling about some of it, but very little)

Thanks for that reference. I’m aware of Baez’s blog but don’t follow it.

That put you two up on me; I get neither an inkling nor a dim

inkling. It’s like hearing aliens from Alpha Centauri talking at

first contact, and realizing that while they seem to have learned

English, the higher-order thoughts that guide the language are

nothing like ours.

I get a little more from it, but I still feel that I’m gazing up at the clouds around lofty Parnassus.

Despite his mentions of control theory, he hasn’t actually got round yet to discussing control systems. I’ll try and clamber up some of the foothills before he does.

–

Richard Kennaway, jrk@cmp.uea.ac.uk, http://www.cmp.uea.ac.uk/~jrk/

School of Computing Sciences,

University of East Anglia, Norwich NR4 7TJ, U.K.

7

[from Avery Andrews (2010-02-23 8:49 Eastern Oz DST)]

It won't take you very far up the mountain ...

It's well regarded as an introduction for people who don't know much/any math, although I so far haven't been able to get very far into it, having a better time with various books that are supposed to be harder (Goldblatt, Lambek and Scott).

My interests recently have been in proof theory and some of the easier parts of 'categorical
logic' (results, such as they are, in a paper called 'yet another attempt to explain glue' on my webpage), while the circuit stuff drags in all sorts of other things that I don't know anything
about (yet, at least).

Baez and his mates hang out at a site called 'the n-category cafe', which I think of as 'the ultimate smart kid's clubhouse', and understand somewhere between 2 and 5% of what goes on there ...

···

-----Original Message-----
From: Control Systems Group Network (CSGnet) on behalf of Tracy Harms
Sent: Tue 23/03/2010 5:38 AM
To: CSGNET@LISTSERV.ILLINOIS.EDU
Subject: Re: Control math

[from Tracy B. Harms (2010-03-22 14:35 Pacific)]

Hi, Richard,

There is a book I've heard recommended that I think would be applicable to
the math indicated by Baez. It is:

Conceptual Mathematics: A First Introduction by F. William Lawvere, Stephen
Hoel Schanuel

--
Tracy

On Mon, Mar 22, 2010 at 1:45 PM, Richard Kennaway <jrk@cmp.uea.ac.uk> wrote:

[From Richard Kenanway (20100322.1742)]

[From Bill Powers (2010.03.22.0903 MDT)]

Avery Andrews (2010.03.22 Eastern Oz Daylight Savings) --

Some stuff about control math that Richard Kennaway might have a clue
about

week294

(I have a dim inkling about some of it, but very little)

Thanks for that reference. I'm aware of Baez's blog but don't follow it.

That put you two up on me; I get neither an inkling nor a dim

inkling. It's like hearing aliens from Alpha Centauri talking at
first contact, and realizing that while they seem to have learned
English, the higher-order thoughts that guide the language are
nothing like ours.

I get a little more from it, but I still feel that I'm gazing up at the
clouds around lofty Parnassus.

Despite his mentions of control theory, he hasn't actually got round yet to
discussing control systems. I'll try and clamber up some of the foothills
before he does.

--
Richard Kennaway, jrk@cmp.uea.ac.uk, http://www.cmp.uea.ac.uk/~jrk/&lt;http://www.cmp.uea.ac.uk/~jrk/&gt;
School of Computing Sciences,
University of East Anglia, Norwich NR4 7TJ, U.K.