Pith Number

pith:SMXQM42B

pith:1995:SMXQM42B3I23ZQ2STCCSMZXLEP

not attested not anchored not stored refs pending

The Physical State of the Intergalactic Medium or Can We Measure Y?

A. Blanchard (Observatoire de Strasbourg), D. Barbosa, J.G. Bartlett

arxiv:astro-ph/9506125 v1 · 1995-06-26 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SMXQM42B3I23ZQ2STCCSMZXLEP}

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	2026-05-18T01:40:23.074694Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

932f067341da35bcc35298852666eb23f99b8630c37622f02012aed102545575

Aliases

arxiv: astro-ph/9506125 · arxiv_version: astro-ph/9506125v1 · doi: 10.48550/arxiv.astro-ph/9506125 · pith_short_12: SMXQM42B3I23 · pith_short_16: SMXQM42B3I23ZQ2S · pith_short_8: SMXQM42B

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/SMXQM42B3I23ZQ2STCCSMZXLEP \
  | 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: 932f067341da35bcc35298852666eb23f99b8630c37622f02012aed102545575

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "461ecb36188b96537a25afe491f2d0a35d32f7d52aa8c4ffb5db5d7d8a3a1e3e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-06-26T16:38:10Z",
    "title_canon_sha256": "d1d614c66a420258f721f90c56eb9b3e10359c1c53707c3e85074247cf21446f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9506125",
    "kind": "arxiv",
    "version": 1
  }
}