Pith Number

pith:XFQG7AXJ

pith:2016:XFQG7AXJ65IJ3YOMS2KN3NBCG4

not attested not anchored not stored refs pending

Strong deformation retraction of the space of Zoll Finsler projective planes

St\'ephane Sabourau

arxiv:1603.02129 v1 · 2016-03-07 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XFQG7AXJ65IJ3YOMS2KN3NBCG4}

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	2026-05-18T01:19:31.585728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9606f82e9f7509de1cc9694ddb4223737b53b85a63b53c8f485af6b0227d8aa

Aliases

arxiv: 1603.02129 · arxiv_version: 1603.02129v1 · doi: 10.48550/arxiv.1603.02129 · pith_short_12: XFQG7AXJ65IJ · pith_short_16: XFQG7AXJ65IJ3YOM · pith_short_8: XFQG7AXJ

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/XFQG7AXJ65IJ3YOMS2KN3NBCG4 \
  | 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: b9606f82e9f7509de1cc9694ddb4223737b53b85a63b53c8f485af6b0227d8aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65e0d6f80858a87bf5a9d96c5ed356ed83e202a232dd307211663872a1572cad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-03-07T16:09:18Z",
    "title_canon_sha256": "9f17c9daed742e660db4e93e92371150de8860891fdc17850b811542117fc5d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.02129",
    "kind": "arxiv",
    "version": 1
  }
}