Pith Number

pith:QREUCPOZ

pith:1999:QREUCPOZ4U6GMDM57G3FJU5TLH

not attested not anchored not stored refs pending

More D-branes in the Nappi-Witten background

JM Figueroa-O'Farrill, S Stanciu

arxiv:hep-th/9909164 v2 · 1999-09-22 · 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{QREUCPOZ4U6GMDM57G3FJU5TLH}

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	2026-07-04T16:14:58.260721Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8449413dd9e53c660d9df9b654d3b359ca495545582917a85a113b3db4c0c537

Aliases

arxiv: hep-th/9909164 · arxiv_version: hep-th/9909164v2 · doi: 10.48550/arxiv.hep-th/9909164 · pith_short_12: QREUCPOZ4U6G · pith_short_16: QREUCPOZ4U6GMDM5 · pith_short_8: QREUCPOZ

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/QREUCPOZ4U6GMDM57G3FJU5TLH \
  | 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: 8449413dd9e53c660d9df9b654d3b359ca495545582917a85a113b3db4c0c537

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3eba2b1fbddc7417135127d6ea22ee1d5a6bad58f1080d79f745c0409e1e18a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "1999-09-22T21:12:37Z",
    "title_canon_sha256": "d1ec6244e6807cd71ed18513462576b624d11a18d92ce770ea3d24bbfe2f005c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/9909164",
    "kind": "arxiv",
    "version": 2
  }
}