Pith Number

pith:ZHCQMNTA

pith:2015:ZHCQMNTAGIXYQ7PKUHNQI3WU3H

not attested not anchored not stored refs pending

Locally Helical Surfaces have bounded twisting

David Bachman, Eric Sedgwick, Ryan Derby-Talbot

arxiv:1502.05646 v1 · 2015-02-19 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZHCQMNTAGIXYQ7PKUHNQI3WU3H}

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	2026-05-18T00:21:00.579437Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c9c5063660322f887deaa1db046ed4d9c64a4cbef02e97f45187adb0987cbfd4

Aliases

arxiv: 1502.05646 · arxiv_version: 1502.05646v1 · doi: 10.48550/arxiv.1502.05646 · pith_short_12: ZHCQMNTAGIXY · pith_short_16: ZHCQMNTAGIXYQ7PK · pith_short_8: ZHCQMNTA

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/ZHCQMNTAGIXYQ7PKUHNQI3WU3H \
  | 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: c9c5063660322f887deaa1db046ed4d9c64a4cbef02e97f45187adb0987cbfd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c51db05f94f5bc40b431fa9e0ad164861c7ad667b1c01902fd416e73600c75e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2015-02-19T17:36:32Z",
    "title_canon_sha256": "e5184d57a9b716eac606add65122218c0cc4ebd31a488966ddcd0fba024c9e95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.05646",
    "kind": "arxiv",
    "version": 1
  }
}