Pith Number

pith:7HIIP3SR

pith:2016:7HIIP3SRS5A6KFAOOKHSJJJLRX

not attested not anchored not stored refs pending

Spherical, hyperbolic and other projective geometries: convexity, duality, transitions

Andrea Seppi, Fran\c{c}ois Fillastre

arxiv:1611.01065 v2 · 2016-11-03 · 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{7HIIP3SRS5A6KFAOOKHSJJJLRX}

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	2026-05-17T23:45:15.818872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9d087ee519741e5140e728f24a52b8dcfa3ef3c3fb753eb43404af49465d22e

Aliases

arxiv: 1611.01065 · arxiv_version: 1611.01065v2 · doi: 10.48550/arxiv.1611.01065 · pith_short_12: 7HIIP3SRS5A6 · pith_short_16: 7HIIP3SRS5A6KFAO · pith_short_8: 7HIIP3SR

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/7HIIP3SRS5A6KFAOOKHSJJJLRX \
  | 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: f9d087ee519741e5140e728f24a52b8dcfa3ef3c3fb753eb43404af49465d22e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2869d7a2626333fc7d5f994e7e25cc2a533cfe39cfe0d995420649c3aad0462",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-11-03T15:31:52Z",
    "title_canon_sha256": "6beb2c368ebda468d34da334bb46df8279d77f6cb1110d4563c018d417009037"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.01065",
    "kind": "arxiv",
    "version": 2
  }
}