MatSci-SAMCompare exact published wording and inspect when definitions, revisions, comments, and voting acts were recorded.
Each mark is one recorded act. Select a publication or revision to inspect its wording below.
Showing 3 recorded events for all 2 definitions.
Exact recorded times are retained; the axis is labelled in UTC. Event types are not combined into a weighted activity or impact score.
Definition 2, revision 1 · Jul 26, 2026, 11:21 AM UTC
This is the first recorded text for this definition.
Select two current candidates to see their exact wording differences. Removed text belongs to the first selection; added text belongs to the second.
Compared with Definition 1, revision 1, reading from the first selection to the second.
ARemoved: simplified stand-in for the nucleus and tightly bound core electrons of an atom, constructed so that the valence eleAdded: n effective potential used in computational quantum mechanics to replace the complex interactRemoved: rAdded: ionRemoved: s beRemoved: have as they would in the full system. Replacing the sharply varying core regiAdded: tween an ion's nucleus and its core electronAdded: s with a sRemoved: mooth effective potential is what makes plane-wave electronic structure calculations tractableAdded: implified potential, focusing calculations solely on the chemically active valence electrons.
The magnitude runs from 0 for unchanged text to 1 for complete replacement. It measures definition wording only—not authorship, quality, or community impact.
The same events as the plot, newest first, with exact UTC times and links to the revision each act concerned.
| Time | Definition | Event | Detail |
|---|---|---|---|
| Jul 26, 2026, 11:22 AM UTC | Definition 1 · revision 1 | Vote act | Upvote recorded; imported historical act |
| Jul 26, 2026, 11:21 AM UTC | Definition 2 · revision 1 | Publication | AI-generated revision |
| Jul 26, 2026, 11:21 AM UTC | Definition 1 · revision 1 | Publication | Initial revision |