Mostly book reviews, plus whatever else I feel like posting. I welcome comments and conversation. Comments are moderated, so it may take a day or two for your comment to appear. Or send a mail to wolfmac@sympatico.ca If you quote, please also link to this blog. If you like this blog, please follow it. Highest review rating is four stars ****
06 December 2013
Nicola Davies and Neal Layton. Poop (2004)
Nicola Davies and Neal Layton. Poop (2004) Nicely written and illustrated introduction to the subject, with an emphasis on its ecological importance. Lots of interesting and odd facts, chosen to astonish and amuse the children who are the intended audience. **½ (2008)
Dorothy E. Skinkle. Star Giant (1969)
Brian Clegg. A Brief History of Infinity (2003)
The notion of infinity has now, after the invention and development of set theory, a good logical foundation, but there are still conundrums worth pursuing. Clegg’s account of Russell’s paradox set me to thinking about the difference between sets and their elements. The questions is, does it make sense to speak of the type of a set or of its elements? If so, is the type of a set necessarily that of its elements? If not, then supersets need not be the same type as the sets that are its elements. There is perhaps a hint of this in the fact that the set of all subsets of a set is of larger size than the set itself. Anyhow, if a set and its elements are not of the same type, then Russell’s paradox dissolves. Or so it seems to me.
More formally: define a simple set S(e) as one whose elements e are not themselves sets. Define the superset S’(S(e)) as the set whose members are S(e) and all its subsets. BTW, if S(e) is finite, then so is S’(S(e)). If S(e) is infinite, then S’(Se)) is its power set. We define the type of set as the type of its elements. Thus, a simple set is of the same type as its elements.
The question I now ask is whether S and S’ are of the same type. I have defined the type of a set as the type of elements which are its members. Thus H(h) = “all human beings” by definition is type h, where h = “human being”. All its subsets will also be of type h. But what about its superset H’(H(h))? Is it of type h? IOW, is it true that H(h) –> H’(h)? It seems to me that this is not a necessary consequence. For while H(h) is of type H, H’ is of type “set”. IOW, I suspect (but cannot prove) that H’ is an axiomatic claim. It amounts to saying that a set may be subset of itself. Suppose we deny that. Then I think Russell’s paradox dissolves. Let S(-s) = “Sets that do not contain themselves.” Then if S’(S(-s)) does not imply S’(-s), the paradox dissolves.
I don’t know whether this line of thought makes sense. [Note 21 Dec 2008: after some rewriting, it seems to me there’s a contradiction in it. Needs more work, but the contradiction may be fundamental.] Nor do I know whether Russell or someone else has explored the consequences of forbidding that a set may be its own subset. It does not, as far as I can tell, forbid that a subset may of the same cardinality as the set (as is the case with infinite sets).
Footnote 1: Intersections and unions of sets will be of mixed type. Eg, if we define L(l), l=living, then intersection K of L and H will be K(h, l). Etc.
Footnote 2: The notation needs to be worked out some more. Let H<1 n="">(h) be a set of n elements of type h. Then some subset of it would be H
Footnote 3: It’s probably all nonsense.
Good book. **1/2 (2008)
Reginald Hill. Exit Lines (1984)
Hill’s vision too is dark and melancholy, but he lacks the elegiac tone of Burley’s books. His vision is more ironic: the murder was based on false impressions of available wealth, the accidental death was triggered by intermittent dementia and terror, and the reason for the apparent cover-up of Dalziel’s involvement in a road death was a deep cover anti-drug investigation. The TV series plays up the irony, and makes the fat man more of a jerk than he really is. Or maybe the Yorkshire accent makes anyone sound like a jerk. According to the date in the back, I had read this book last year, but nothing much stuck: it was as much fun the second time as the first. **½ . (2008)
28 November 2013
L. R. Wright. Sleep While I Sing (1986)
The actor goes back to L.A., and Alberg and Cassandra resume their tentative friendship. Nicely plotted, characters we care about, well done Sunshine Coast ambience with a believably awful, wet, and foggy winter, plausible imitation of police procedure, some nicely observed sub-plots, all these add up to a pleasant read. Wright likes pathological psychology, but she doesn’t overdo the weirdness. The title alludes to the murderer’s habit of singing to his dead victims. **½
Stephen Pile. The Book of Heroic Failure (1979)
24 November 2013
W. J. Burley. Wycliffe and the Dunes Mystery (1993)
W. J. Burley. Wycliffe and the Dunes Mystery (1993) Supt. Charles Wycliffe was well realised by Jack Shepherd in the well-done TV series based on Burley’s books. They are well imagined and plotted police procedurals, somewhat in the style of P. D. James, with more emphasis on character than on plot and forensics. An accidental death, discovered when the corpse is revealed after a storm that changes the dunes 18 years later, is used as camouflage for a murder. Burley’s vision is elegiac and melancholy, the TV series captures the tone very well indeed. This was a pleasant read, much of it on the train back from Alberta. **½ (2008)
Dick Whittington - What Really Happened (Sitwell, 1945)
Osbert Sitwell. The True Story of Dick Whittington (1946) My great-aunt Dolly gave me this book in 1949. I wonder whether she read it firs...
-
John Cunningham. The Tin Star (Collier’s, December 4, 1947) The short story adapted for High Noon . As often happens, the movie retains v...
-
I heard the phrase recently. Can’t recall exactly when. It was uttered on a radio program, but I can’t recall what the program was about. Pr...
-
Today we remember those whom we sent into war on our behalf, and who gave everything they had. They gave their lives. I want to think a...

