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Talk:Binomial type

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A funny sum

[edit]

Anyone ever see something that looks like this:

Any identities, relations,etc. for such a thing? Does it have a name? Its painfully suggestive of something but I can't put my finger on it ... linas 04:30, 19 August 2005 (UTC)[reply]

Those are called Appel sequences. Like sequences of binomial type, they're a special case of Sheffer sequences. Michael Hardy 18:29, 8 May 2006 (UTC)[reply]
i dont get it, whats the definition?