Pith Number

pith:EG6PNDAM

pith:2017:EG6PNDAM3XIKBV6EKDEEYKLQIE

not attested not anchored not stored refs pending

Groups of fast homeomorphisms of the interval and the ping-pong argument

Collin Bleak, Justin Tatch Moore, Martin Kassabov, Matthew C. B. Zaremsky, Matthew G. Brin

arxiv:1701.08321 v1 · 2017-01-28 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EG6PNDAM3XIKBV6EKDEEYKLQIE}

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	2026-05-18T00:51:54.536197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21bcf68c0cddd0a0d7c450c84c29704110579d9811213512167dcbcc98e86f77

Aliases

arxiv: 1701.08321 · arxiv_version: 1701.08321v1 · doi: 10.48550/arxiv.1701.08321 · pith_short_12: EG6PNDAM3XIK · pith_short_16: EG6PNDAM3XIKBV6E · pith_short_8: EG6PNDAM

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/EG6PNDAM3XIKBV6EKDEEYKLQIE \
  | 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: 21bcf68c0cddd0a0d7c450c84c29704110579d9811213512167dcbcc98e86f77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf6b99edb33c2a8a730493a6a25f6a9198f698e62c880732b5a9ba0245b316ad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-01-28T21:10:48Z",
    "title_canon_sha256": "0d96650ab885bfadd6782315e07d5c6579d3f13743aad96d80ef718b6cb40319"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.08321",
    "kind": "arxiv",
    "version": 1
  }
}