Pith Number

pith:XDL62GCU

pith:2007:XDL62GCUJA2KZOUROWZKLWSTCJ

not attested not anchored not stored refs pending

String Theory: Progress and Problems

John H. Schwarz

arxiv:hep-th/0702219 v2 · 2007-02-27 · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XDL62GCUJA2KZOUROWZKLWSTCJ}

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	2026-07-04T17:08:32.410449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8d7ed18544834acba9175b2a5da5312704014bce05478a81f8f23850379e2fa

Aliases

arxiv: hep-th/0702219 · arxiv_version: hep-th/0702219v2 · doi: 10.48550/arxiv.hep-th/0702219 · pith_short_12: XDL62GCUJA2K · pith_short_16: XDL62GCUJA2KZOUR · pith_short_8: XDL62GCU

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/XDL62GCUJA2KZOUROWZKLWSTCJ \
  | 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: b8d7ed18544834acba9175b2a5da5312704014bce05478a81f8f23850379e2fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "855332fc0aa0821d63310a4ae8a2a7212cdc8dadf84e24cb77a910f3f0322ae4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "2007-02-27T22:32:36Z",
    "title_canon_sha256": "909337f1ad5b30134adf95cc2680dd62606dcac596433ca2cdf4972bb6cb5baf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/0702219",
    "kind": "arxiv",
    "version": 2
  }
}