Pith Number

pith:CBMSV6SI

pith:2026:CBMSV6SILV77WJFNEVK5FE4C4N

not attested not anchored not stored refs pending

Recognition of algebraic matroids is undecidable

Geva Yashfe, Tobias Boege

arxiv:2607.14907 v1 · 2026-07-16 · math.CO · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CBMSV6SILV77WJFNEVK5FE4C4N}

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	2026-07-17T01:21:58.169820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10592afa485d7ffb24ad2555d29382e34ceeba976d01ce586ef587f529162fc8

Aliases

arxiv: 2607.14907 · arxiv_version: 2607.14907v1 · doi: 10.48550/arxiv.2607.14907 · pith_short_12: CBMSV6SILV77 · pith_short_16: CBMSV6SILV77WJFN · pith_short_8: CBMSV6SI

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/CBMSV6SILV77WJFNEVK5FE4C4N \
  | 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: 10592afa485d7ffb24ad2555d29382e34ceeba976d01ce586ef587f529162fc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab7262043aaa5ab6c9a4f7cabb178ee5589f4ad66d4992db48fdcf955fde05bc",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2026-07-16T12:25:38Z",
    "title_canon_sha256": "1dc08c5982305d2673998e93942a6735e23411d144015a801c7b8d45f7339ec3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.14907",
    "kind": "arxiv",
    "version": 1
  }
}