Source history
Detailed backend records are private. Public author/source status appears above.
The permanent identity and original source provenance are retained below.
{
"key": "work:W000050:pdf:515109098ae5cd73bf266fa97bf498b4e8c7adb6e936be67e6fa9a86bb69020d:page:1609:bbox:90.0,260.164,522.003,271.954",
"first_source_version": "2018-02-03",
"chapter": "work-w000050",
"work": "W000050",
"kind": "Proof",
"number": "",
"title": "Proof of Theorem 21.1.6.12. The implication p1q ñ p2q is obvious, the equivalence p2q ñ p3q",
"source_version": "2018-02-03",
"source": {
"pdf_sha256": "515109098ae5cd73bf266fa97bf498b4e8c7adb6e936be67e6fa9a86bb69020d",
"page": 1609,
"bbox": [
90.0,
260.164,
522.003,
271.954
]
},
"target": "/chapters/work-w000050.html",
"identity_basis": "pinned original PDF hash and exact page/bbox; never display number",
"status": "active"
}