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This is an old revision of this page, as edited by 4C~enwiki (talk | contribs) at 12:42, 5 April 2008 (→Liouville number: good). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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Hello, Ale2006, and welcome to Misplaced Pages! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

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Email forwarding

Hi Ale

Thanks for your notes on Email forwarding. This whole area confuses me not a little as a user (I have little experience of the internals), so it seems like we need to clarify things. Re filters, I think of clients like Thunderbird and Eudora, which as I understand it function on the client. The other cases relate to Unix-style ~/.forward files, which exist definitely in userspace and achieve forwarding -- but whether as the local user or as the local sendmail daemon -- I know not.

I find your English excellent: I haven't "amended" as much as edited for style -- a personal thing.

Hope this helps.

-- Pedant17 (talk) 00:49, 15 December 2007 (UTC)

Domain name system

Hi. "Return-Path" is a header added by many delivery agents with the contents of the envelope from. Doesn't SPF operate on the envelope from, not on the nonstandard Return-Path? jhawkinson (talk) 14:51, 23 February 2008 (UTC)

Yes, you're quite right, 2821 (and 821) did clearly standardize Return-Path. I'm not sure why I thought it was simply an implementation convention and not a standard, but I was definitely wrong. Sorry about that. jhawkinson (talk) 18:40, 2 April 2008 (UTC)

Liouville number

Hi! First of all, sorry for my English. Now, why ${\displaystyle L=\bigcap \limits _{n=1}^{\infty }U_{n}\setminus {\mathbb {Q} }}$ is G-delta? Let ${\displaystyle A=\bigcap \limits _{n=1}^{\infty }U_{n}}$; Q is an F-sigma set so Q is G-delta and ${\displaystyle A\setminus Q=A\cap Q^{c}}$ is G-delta as an intersection of two G-delta sets. By definition, L is a meagre set. Best, 4 08:14, 24 March 2008 (UTC)

Hi! By Meagre set#Definition we have that L is comeagre so L_c must be meagre. Am I wrong? It is possible, I might have confused definitions. If I am not wrong maybe this phrase from the article confuses you: "...and it follows that is a dense G-delta set, since its complement is a meagre set" - if so, it should be rephrased. Maybe "... and it follows its complement is a meagre set". Best, 4 11:04, 3 April 2008 (UTC)

Good idea! I think that your changes will improve the text. And how much of the topological idea of "bigness" - it is borrowed from Oxtoby's book quoted in the Reference section. Do as you please. Best, 4 12:42, 5 April 2008 (UTC)