Pith Number

pith:RAAIYCFI

pith:2026:RAAIYCFI4EZBOQNAOIT2CYPNYG

not attested not anchored not stored refs pending

Tangent classes for matroid building sets

Ronnie Cheng

arxiv:2606.22650 v1 · 2026-06-21 · math.AG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RAAIYCFI4EZBOQNAOIT2CYPNYG}

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.

Cited by

4 papers in Pith

Tangent classes of matroids and wonderful compactifications

Danus: Orchestrating Mathematical Reasoning Agents with Fact-Graph Memory

Tangent classes of matroids and wonderful compactifications

Danus: Orchestrating Mathematical Reasoning Agents with Fact-Graph Memory

Receipt and verification

First computed	2026-06-23T02:13:43.973015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88008c08a8e1321741a07227a161edc1ad4f202dbc311029246531a110a1952b

Aliases

arxiv: 2606.22650 · arxiv_version: 2606.22650v1 · doi: 10.48550/arxiv.2606.22650 · pith_short_12: RAAIYCFI4EZB · pith_short_16: RAAIYCFI4EZBOQNA · pith_short_8: RAAIYCFI

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/RAAIYCFI4EZBOQNAOIT2CYPNYG \
  | 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: 88008c08a8e1321741a07227a161edc1ad4f202dbc311029246531a110a1952b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a25ec9ac3685f9878ebb14eb11ef5e1348bebc649f47e22814434ac61b4d51ba",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-06-21T19:50:44Z",
    "title_canon_sha256": "9321a299f746887f277264222cc14cb8200a57428c0ec5fbcba74213a29a22ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.22650",
    "kind": "arxiv",
    "version": 1
  }
}