Pith Number

pith:T5IND4FF

pith:2021:T5IND4FFQOYRBNP7FOKTNGHY3G

not attested not anchored not stored refs pending

Configuration spaces of disks in a strip, twisted algebras, persistence, and other stories

Fedor Manin, Hannah Alpert

arxiv:2107.04574 v2 · 2021-07-09 · math.AT · math.CO · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T5IND4FFQOYRBNP7FOKTNGHY3G}

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	2026-07-05T07:58:14.779877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f50d1f0a583b110b5ff2b953698f8d9a7841e3ff51ab9ce2f2998f9d818c50d

Aliases

arxiv: 2107.04574 · arxiv_version: 2107.04574v2 · doi: 10.48550/arxiv.2107.04574 · pith_short_12: T5IND4FFQOYR · pith_short_16: T5IND4FFQOYRBNP7 · pith_short_8: T5IND4FF

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/T5IND4FFQOYRBNP7FOKTNGHY3G \
  | 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: 9f50d1f0a583b110b5ff2b953698f8d9a7841e3ff51ab9ce2f2998f9d818c50d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "430031c3c86a3b1f0cbe1fa7502a943099462850fe400faa2d1d5121a82a0396",
    "cross_cats_sorted": [
      "math.CO",
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2021-07-09T17:47:04Z",
    "title_canon_sha256": "e2725cb5fbd744dc8a5d6873947fb54896de0bacfd4ab8aece43081b06ed8d47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.04574",
    "kind": "arxiv",
    "version": 2
  }
}