Pith Number

pith:O7PT2X4M

pith:2015:O7PT2X4MQESR5GRFWJAXN4XA3S

not attested not anchored not stored refs pending

Density matrix of black hole radiation

A.J.M. Medved, Andrei Khmelnitsky, Lasma Alberte, Ram Brustein

arxiv:1502.02687 v2 · 2015-02-09 · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O7PT2X4MQESR5GRFWJAXN4XA3S}

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.

Receipt and verification

First computed	2026-05-18T01:34:24.664531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77df3d5f8c81251e9a25b24176f2e0dc87d0b98058ac4886a0f03007b935c9a8

Aliases

arxiv: 1502.02687 · arxiv_version: 1502.02687v2 · doi: 10.48550/arxiv.1502.02687 · pith_short_12: O7PT2X4MQESR · pith_short_16: O7PT2X4MQESR5GRF · pith_short_8: O7PT2X4M

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/O7PT2X4MQESR5GRFWJAXN4XA3S \
  | 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: 77df3d5f8c81251e9a25b24176f2e0dc87d0b98058ac4886a0f03007b935c9a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e3e78cd938aa7929e93f29cf2aaa29f4c27da47994deb3f6399073340ebcb49",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2015-02-09T21:15:01Z",
    "title_canon_sha256": "0d9b1cf3671fb92464bcf9a4799404898192b2c29e49c5ae3c63644dd20a758a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02687",
    "kind": "arxiv",
    "version": 2
  }
}