Pith Number

pith:EYRPKBJS

pith:2019:EYRPKBJSCY2L3HFG2BD4ZOBYON

not attested not anchored not stored refs pending

A Formaldehyde Deep Field

Jeremy Darling

arxiv:1904.00803 v1 · 2019-03-28 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EYRPKBJSCY2L3HFG2BD4ZOBYON}

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	2026-05-17T23:49:45.441573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2622f505321634bd9ca6d047ccb83873537d021d6168d206f7f44c2a0cbe4d46

Aliases

arxiv: 1904.00803 · arxiv_version: 1904.00803v1 · doi: 10.48550/arxiv.1904.00803 · pith_short_12: EYRPKBJSCY2L · pith_short_16: EYRPKBJSCY2L3HFG · pith_short_8: EYRPKBJS

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/EYRPKBJSCY2L3HFG2BD4ZOBYON \
  | 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: 2622f505321634bd9ca6d047ccb83873537d021d6168d206f7f44c2a0cbe4d46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e52118f237fdb71380957625e1628eccf3adbfd3c4280387463e11944daa04e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-03-28T19:50:14Z",
    "title_canon_sha256": "429d87d5376e55160bbf491c8fc7ad567d004284a06d23bd55a3a09bccaed677"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.00803",
    "kind": "arxiv",
    "version": 1
  }
}