Pith Number

pith:OBWPG6NN

pith:2018:OBWPG6NNNKSEPCXNFCE3V5MYGK

not attested not anchored not stored refs pending

Goeritz and Seifert Matrices from Dehn Presentations

Daniel S. Silver, Lorenzo Traldi, Susan G. Williams

arxiv:1808.10296 v1 · 2018-08-30 · 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{OBWPG6NNNKSEPCXNFCE3V5MYGK}

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	2026-05-18T00:06:49.224841Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

706cf379ad6aa4478aed2889baf5983284b70c2001fe60fe1f8312c917718d6e

Aliases

arxiv: 1808.10296 · arxiv_version: 1808.10296v1 · doi: 10.48550/arxiv.1808.10296 · pith_short_12: OBWPG6NNNKSE · pith_short_16: OBWPG6NNNKSEPCXN · pith_short_8: OBWPG6NN

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/OBWPG6NNNKSEPCXNFCE3V5MYGK \
  | 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: 706cf379ad6aa4478aed2889baf5983284b70c2001fe60fe1f8312c917718d6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fae8dfeb3458439a6130ee9208355eb7ce5ff5936dec7428c98fc7db9899217",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2018-08-30T13:43:01Z",
    "title_canon_sha256": "4bb965a09f046caf4823f7594909e83b60b488d86b7f8b96f27a0259ef57927e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.10296",
    "kind": "arxiv",
    "version": 1
  }
}