Pith Number

pith:3NCFNTMY

pith:2018:3NCFNTMY4ULJ2Q2SW3C6KXDFDL

not attested not anchored not stored refs pending

Excitation of positronium from 2S to 20P state

B. Radics, G. Wichmann, M. W. Heiss, P. Crivelli

arxiv:1809.07854 v1 · 2018-09-20 · physics.atom-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3NCFNTMY4ULJ2Q2SW3C6KXDFDL}

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

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	2026-05-18T00:05:11.110936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db4456cd98e5169d4352b6c5e55c651afdff41be458f0fd2f87d1634cbb1092d

Aliases

arxiv: 1809.07854 · arxiv_version: 1809.07854v1 · doi: 10.48550/arxiv.1809.07854 · pith_short_12: 3NCFNTMY4ULJ · pith_short_16: 3NCFNTMY4ULJ2Q2S · pith_short_8: 3NCFNTMY

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/3NCFNTMY4ULJ2Q2SW3C6KXDFDL \
  | 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: db4456cd98e5169d4352b6c5e55c651afdff41be458f0fd2f87d1634cbb1092d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "574fb506eb71cca2663e4086839b8e42ad075660b95a0bfefcda8228af36026a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2018-09-20T21:01:35Z",
    "title_canon_sha256": "4a8c292700a20b66d40864ff42100c721c2de316711e157c7646e7b1167ad18d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.07854",
    "kind": "arxiv",
    "version": 1
  }
}