Talk:Diamond principle

Surely the index on the diamond symbol ought to be Kappa rather than S? That would make sense with diamond_\omega_1 131.111.231.40 16:09, 27 Apr 2005 (UTC)

\omega_1 is a perfectly good stationary subset of \omega_1. I've certainly seen where both are specified, But any given S can only be stationary for one particular kappa. Rdore 09:31, 11 February 2006 (UTC)[reply]

Diamondsuit or Diamond?

I'm curious about the title of this entry... I've never heard anyone refer to this principle as "diamond-suit" in regular speech, but only as "diamond." I know that Latex requires one to type "\diamondsuit" to input this character correctly, but it seems nonsensical to give this entry the title of its Latex command. What's next, renaming the forcing page "Vdash"? Physcher 11:18, 17 June 2007 (UTC)[reply]

Call the article Diamond (mathematics). 118.90.18.154 (talk) 05:50, 5 October 2008 (UTC)[reply]

diamondsuit

i was using my computer and i could NOT think of the geomectrical (mathematical) term and i saw this an' i thought "what a weird word!" i thought if someone would please give me the...scratch that... give me a more precise meaning, i could better understand--71.181.223.144 (talk) 21:37, 9 January 2008 (UTC)[reply]

Notation

I am not familiar with the notation $\kappa ^{+}$ used in the article. What does the plus mean? — Tobias Bergemann (talk) 08:09, 6 October 2008 (UTC)[reply]

This denotes the successor of cardinal κ. That is, the least cardinal larger than cardinal κ. See successor cardinal. Kope (talk) 17:14, 13 October 2008 (UTC)[reply]