Pith Number

pith:HM7DFXX5

pith:2018:HM7DFXX5XFSQTYVXRC6PGWYUMB

not attested not anchored not stored refs pending

Effective sound speed in relativistic accretion discs around Schwarzschild black holes

Md Arif Shaikh, Sankhasubhra Nag, Susovan Maity, Tapas Kumar Das

arxiv:1806.04084 v2 · 2018-06-11 · astro-ph.HE · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HM7DFXX5XFSQTYVXRC6PGWYUMB}

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	2026-05-17T23:58:47.927525Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b3e32defdb96509e2b788bcf35b14606edb7e3fa5294c9645ac1461631ed409

Aliases

arxiv: 1806.04084 · arxiv_version: 1806.04084v2 · doi: 10.48550/arxiv.1806.04084 · pith_short_12: HM7DFXX5XFSQ · pith_short_16: HM7DFXX5XFSQTYVX · pith_short_8: HM7DFXX5

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/HM7DFXX5XFSQTYVXRC6PGWYUMB \
  | 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: 3b3e32defdb96509e2b788bcf35b14606edb7e3fa5294c9645ac1461631ed409

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8bddce800f0299e8c465a66d1e72b79f92c2391912562075625201f454e60c1",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-06-11T16:09:59Z",
    "title_canon_sha256": "ebfc2e19d778b0331aab24e0fb32221ba29e30578cfd037570432367f37113f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.04084",
    "kind": "arxiv",
    "version": 2
  }
}