Pith Number

pith:YQA6BK5L

pith:2021:YQA6BK5L7HXELYOTYQWXZD53RC

not attested not anchored not stored refs pending

A semiclassical singularity theorem

Christopher J. Fewster, Eleni-Alexandra Kontou

arxiv:2108.12668 v1 · 2021-08-28 · gr-qc · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YQA6BK5L7HXELYOTYQWXZD53RC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

3 papers in Pith

Modave lectures on energy conditions in quantum field theory and semi-classical gravity

Curious QNEIs from QNEC: New Bounds on Null Energy in Quantum Field Theory

A Quantum Singularity Theorem for the Evaporating Black Hole

Receipt and verification

First computed	2026-07-05T04:13:40.741417Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c401e0ababf9ee45e1d3c42d7c8fbb88aa8cc11b1082701e6f0e072982b80b22

Aliases

arxiv: 2108.12668 · arxiv_version: 2108.12668v1 · doi: 10.48550/arxiv.2108.12668 · pith_short_12: YQA6BK5L7HXE · pith_short_16: YQA6BK5L7HXELYOT · pith_short_8: YQA6BK5L

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YQA6BK5L7HXELYOTYQWXZD53RC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c401e0ababf9ee45e1d3c42d7c8fbb88aa8cc11b1082701e6f0e072982b80b22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b58d701f8cc75fd73f54f3c1734b50a98c01d3641144b928c4e370148b9f52e",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2021-08-28T15:59:29Z",
    "title_canon_sha256": "caabc726f01ffe9f8bbf06088e62b4ac608f07859ee6a7e1af2038566cd7a8fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.12668",
    "kind": "arxiv",
    "version": 1
  }
}