Wikipedia:WikiProject Mathematics/PlanetMath Exchange/39-XX Difference and functional equations

This page provides a list of all articles available at PlanetMath in the following topic:

39-XX Difference and functional equations.

This list will be periodically updated. Each entry in the list has three fields:

1. PM : The first field is the link to the PlanetMath article, along with the article's object ID.
2. WP : The second field is either a "guessed" link to a correspondingly named Wikipedia article, produced by the script which generated the list, or one or more manually entered links to the corresponding Wikipedia articles on the subject.
3. Status : The third field is the status field, which explains the current status of the entry. The recommended status entries are:

Status	means PM article
N	not needed
A	adequately covered
C	copied
M	merged
NC	needs copying
NM	needs merging

• Please update the WP and Status fields as appropriate.
• if the WP field is correct please remove the qualifier "guess".
• If the corresponding Wikipedia article exists, but the link to it is wrong, please fix the link.
• If you copy or merge an article from PlanetMath, please update the WP and Status fields for that entry.
• If you have any comments, for example, thoughts on how the PlanetMath article compares to the corresponding Wikipedia article(s), please place such comments on a new indented line following the entry. Comments of this kind are very valuable.

Don't forget to include the relevant template if you copy over text or feel like an external link is warranted

• {{planetmath|id=|title=}} for copied over text
• {{planetmath reference|id=|title=}} for an external link

See the main page for examples and usage criteria.

One can use the web-based program Pmform to convert PlanetMath articles to the Wikipedia format. As a side benefit, this tool will place the PlanetMath template for you.

39A70 Difference operators

• PM: divided difference, id=6288 -- WP: divided differences -- Status: NM

Some content from PM is not present in the WP article. Ben Cairns 06:49, 3 Feb 2005 (UTC).

• PM: explicit formula for divided differences, id=6295 -- WP: divided differences -- Status: NM

This explicit formula does not appear in the WP article, and could be merged in. Ben Cairns 06:49, 3 Feb 2005 (UTC).

• PM: divided difference interpolaton formula, id=8447^new! -- WP guess: divided difference interpolaton formula -- Status:

• PM: divided difference table, id=9043^new! -- WP guess: divided difference table -- Status:

• PM: divided differences of powers, id=9033^new! -- WP guess: divided differences of powers -- Status:

• PM: example of divided difference interpolaton, id=9060^new! -- WP guess: example of divided difference interpolaton -- Status:

• PM: solution of equations by divided difference interpolaton, id=9061^new! -- WP guess: solution of equations by divided difference interpolaton -- Status:

• PM: symmetry of divided differences, id=9042^new! -- WP guess: symmetry of divided differences -- Status:

39B05 General

• PM: functional equation, id=3542 -- WP: functional equation -- Status: NM

Some content on the history could be transfered from PM to WP. Ben Cairns 06:53, 3 Feb 2005 (UTC).

39B62 Functional inequalities, including subadditivity, convexity, etc.

• PM: subadditivity, id=4615 -- WP: subadditive -- Status: M

Stub article now expanded. Ben Cairns 02:09, 4 Feb 2005 (UTC).

• PM: superadditivity, id=4616 -- WP: superadditive -- Status: C

Added to List of mathematical topics (S-U). Ben Cairns 02:09, 4 Feb 2005 (UTC).

• PM: subdifferentiable mapping, id=6063 -- WP guess: subdifferentiable mapping -- Status: NC

Couldn't find subdifferentiable on the WP, though it's not my area! Ben Cairns 16:04, 11 April 2006 (UTC)