Pith Number

pith:6U2XS2OS

pith:2001:6U2XS2OSMQJEROLKAREXYFWB6U

not attested not anchored not stored refs pending

Superstrings in 2D Backgrounds with R-R Flux and New Extremal Black Holes

Brenno Carlini Vallilo, Nathan Berkovits, Sergei Gukov

arxiv:hep-th/0107140 v3 · 2001-07-17 · hep-th · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6U2XS2OSMQJEROLKAREXYFWB6U}

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	2026-05-18T02:36:11.849173Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5357969d2641248b96a04497c16c1f53b16c40ec7aa51ac6140838836c212cd

Aliases

arxiv: hep-th/0107140 · arxiv_version: hep-th/0107140v3 · doi: 10.48550/arxiv.hep-th/0107140 · pith_short_12: 6U2XS2OSMQJE · pith_short_16: 6U2XS2OSMQJEROLK · pith_short_8: 6U2XS2OS

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/6U2XS2OSMQJEROLKAREXYFWB6U \
  | 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: f5357969d2641248b96a04497c16c1f53b16c40ec7aa51ac6140838836c212cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0c80fb51c85b577966565f5872ad9733de043ff71d08387475f609420f30e59",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "2001-07-17T15:27:23Z",
    "title_canon_sha256": "db2f8863f3616df354524541b84ff2fcd1d6ed656691c6a90c109eac12255849"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/0107140",
    "kind": "arxiv",
    "version": 3
  }
}