Pith Number

pith:M6FERQDR

pith:2009:M6FERQDRV53KXEBSD6RVKEB6NW

not attested not anchored not stored refs pending

The spiral index of knots

Colin Adams, Laura Starkston, Olga Turanova, Rachel Hudson, Ralph Morrison, Samuel Taylor, William George

arxiv:0903.0393 v1 · 2009-03-03 · 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{M6FERQDRV53KXEBSD6RVKEB6NW}

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	2026-05-18T04:14:38.335931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

678a48c071af76ab90321fa355103e6dbf9bf0bcc654acefda7520d8e95d2b20

Aliases

arxiv: 0903.0393 · arxiv_version: 0903.0393v1 · doi: 10.48550/arxiv.0903.0393 · pith_short_12: M6FERQDRV53K · pith_short_16: M6FERQDRV53KXEBS · pith_short_8: M6FERQDR

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/M6FERQDRV53KXEBSD6RVKEB6NW \
  | 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: 678a48c071af76ab90321fa355103e6dbf9bf0bcc654acefda7520d8e95d2b20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8163af71880b1444e0787ef8978ebabcf1cdddd93da107728e9b12c6fe5d4a2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2009-03-03T16:08:26Z",
    "title_canon_sha256": "5e69612a919fcb33bfe1b2517f3bd0bb1cf2b7af278c6597afaae1d92f649db6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0393",
    "kind": "arxiv",
    "version": 1
  }
}