Pith Number

pith:VPPA3LBX

pith:2017:VPPA3LBXH257KNWILFKITX6G7S

not attested not anchored not stored refs pending

The isoperimetric problem in the 2-dimensional Finsler space forms with k = 0. II

Linfeng Zhou, Mengqing Zhan

arxiv:1711.11440 v2 · 2017-11-29 · 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{VPPA3LBXH257KNWILFKITX6G7S}

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	2026-05-18T00:29:07.713788Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abde0dac373ebbf536c8595489dfc6fca70de71e25aedd95bedc3420c6ce0a1f

Aliases

arxiv: 1711.11440 · arxiv_version: 1711.11440v2 · doi: 10.48550/arxiv.1711.11440 · pith_short_12: VPPA3LBXH257 · pith_short_16: VPPA3LBXH257KNWI · pith_short_8: VPPA3LBX

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/VPPA3LBXH257KNWILFKITX6G7S \
  | 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: abde0dac373ebbf536c8595489dfc6fca70de71e25aedd95bedc3420c6ce0a1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d232051cd7a68e8e0a2573398c73c77c01fe01db1b95acd8658530a71a05b3b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2017-11-29T04:36:05Z",
    "title_canon_sha256": "6519076aa31a0b752fdb1665a2e1e92dc2e9d48d683b1a0966ddd41dcd188c8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.11440",
    "kind": "arxiv",
    "version": 2
  }
}