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

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=8447new! -- WP guess: divided difference interpolaton formula -- Status:


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


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


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


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


 * PM: symmetry of divided differences, id=9042new! -- 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)