Pith Number

pith:YIUUXI2T

pith:2005:YIUUXI2T6BPD5HQ7WQQDXA2CMD

not attested not anchored not stored refs pending

On the twistor space of pseudo-spheres

Isabel M.C. Salavessa, R. Albuquerque

arxiv:math/0509442 v2 · 2005-09-20 · math.DG · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YIUUXI2T6BPD5HQ7WQQDXA2CMD}

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	2026-05-18T04:06:19.409657Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2294ba353f05e3e9e1fb4203b834260f94046c8ed2a28837f8d180ea8fe43d1

Aliases

arxiv: math/0509442 · arxiv_version: math/0509442v2 · doi: 10.48550/arxiv.math/0509442 · pith_short_12: YIUUXI2T6BPD · pith_short_16: YIUUXI2T6BPD5HQ7 · pith_short_8: YIUUXI2T

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/YIUUXI2T6BPD5HQ7WQQDXA2CMD \
  | 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: c2294ba353f05e3e9e1fb4203b834260f94046c8ed2a28837f8d180ea8fe43d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8472a3139dcabf47dd96905f12b9f22072accec5fc9a36f0240d950e26560376",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "",
    "primary_cat": "math.DG",
    "submitted_at": "2005-09-20T01:45:50Z",
    "title_canon_sha256": "7b70ffe3c092f8d11eeb0efc86f8360d6366f4b90a7b9ad3ae88ea9189318984"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0509442",
    "kind": "arxiv",
    "version": 2
  }
}