Pith Number

pith:HSLSGUMC

pith:2015:HSLSGUMCPSFEZQD7C5MVGFW4N3

not attested not anchored not stored refs pending

Pseudospherical surfaces with singularities

David Brander

arxiv:1502.04876 v3 · 2015-02-17 · 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{HSLSGUMCPSFEZQD7C5MVGFW4N3}

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	2026-05-18T01:09:55.409560Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c972351827c8a4cc07f17595316dc6ef5a30485dae6892b18b6948347a387d8

Aliases

arxiv: 1502.04876 · arxiv_version: 1502.04876v3 · doi: 10.48550/arxiv.1502.04876 · pith_short_12: HSLSGUMCPSFE · pith_short_16: HSLSGUMCPSFEZQD7 · pith_short_8: HSLSGUMC

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/HSLSGUMCPSFEZQD7C5MVGFW4N3 \
  | 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: 3c972351827c8a4cc07f17595316dc6ef5a30485dae6892b18b6948347a387d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7d1e3aa99a345b37d9decb4f880b97c1ca498ec0f47af7a91da6fa2119a09c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2015-02-17T12:57:22Z",
    "title_canon_sha256": "03a62c2ac6ea915eaee93ef99e98fe15a9d353670c20de0ee17ea2c8abeb0359"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.04876",
    "kind": "arxiv",
    "version": 3
  }
}