Pith Number

pith:FD3XMRHB

pith:2017:FD3XMRHBR3BVG4GHF7UDNRMNBV

not attested not anchored not stored refs pending

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

Linfeng Zhou

arxiv:1705.03400 v3 · 2017-05-09 · 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{FD3XMRHBR3BVG4GHF7UDNRMNBV}

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	2026-05-18T00:43:08.260803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28f77644e18ec35370c72fe836c58d0d5cecb8c9ce1d51f9e6f5c1328f909b9c

Aliases

arxiv: 1705.03400 · arxiv_version: 1705.03400v3 · doi: 10.48550/arxiv.1705.03400 · pith_short_12: FD3XMRHBR3BV · pith_short_16: FD3XMRHBR3BVG4GH · pith_short_8: FD3XMRHB

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/FD3XMRHBR3BVG4GHF7UDNRMNBV \
  | 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: 28f77644e18ec35370c72fe836c58d0d5cecb8c9ce1d51f9e6f5c1328f909b9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dcddd54d79e77d1619011dcdee7794c7908b31e97e6d6877c4ff5e56fcdb23a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2017-05-09T15:58:03Z",
    "title_canon_sha256": "3b4ac3b69b8425d1c71e8503fab7e7fe1b507ffd12e54e8faa271ccebb32ffee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.03400",
    "kind": "arxiv",
    "version": 3
  }
}