Pith Number

pith:CXP6BGBM

pith:1995:CXP6BGBMGG2I2AYCWUYLPPIR5L

not attested not anchored not stored refs pending

Number of Generations in Free Fermionic String Models,

D. V. Nanopoulos, Ioannis Giannakis, Kajia Yuan

arxiv:hep-th/9502153 v1 · 1995-02-28 · hep-th · hep-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{CXP6BGBMGG2I2AYCWUYLPPIR5L}

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	2026-05-18T01:08:03.972990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

15dfe0982c31b48d0302b530b7bd11ead142a524bb49a02346170bc0b13cd54b

Aliases

arxiv: hep-th/9502153 · arxiv_version: hep-th/9502153v1 · doi: 10.48550/arxiv.hep-th/9502153 · pith_short_12: CXP6BGBMGG2I · pith_short_16: CXP6BGBMGG2I2AYC · pith_short_8: CXP6BGBM

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/CXP6BGBMGG2I2AYCWUYLPPIR5L \
  | 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: 15dfe0982c31b48d0302b530b7bd11ead142a524bb49a02346170bc0b13cd54b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "046b9f415d8ca30ac85ddf272c529c93314f1ba537b36e80b1ea76a445156d52",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "1995-02-28T00:13:03Z",
    "title_canon_sha256": "c7c9c13fb48251c4fa8c744ce7d4d97ce51e57d4137360bd497a71b4f2b1e652"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/9502153",
    "kind": "arxiv",
    "version": 1
  }
}