Pith Number

pith:ZVIGPWZ4

pith:2019:ZVIGPWZ4D74JSSPWHWJZN77HJE

not attested not anchored not stored refs pending

Basis shape loci and the positive Grassmannian

Cameron Marcott

arxiv:1904.13361 v1 · 2019-04-30 · math.CO · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZVIGPWZ4D74JSSPWHWJZN77HJE}

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	2026-05-17T23:47:21.536154Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd5067db3c1ff89949f63d9396ffe74933f895ff851f90104b40278ab6951038

Aliases

arxiv: 1904.13361 · arxiv_version: 1904.13361v1 · doi: 10.48550/arxiv.1904.13361 · pith_short_12: ZVIGPWZ4D74J · pith_short_16: ZVIGPWZ4D74JSSPW · pith_short_8: ZVIGPWZ4

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/ZVIGPWZ4D74JSSPWHWJZN77HJE \
  | 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: cd5067db3c1ff89949f63d9396ffe74933f895ff851f90104b40278ab6951038

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "433fef3da41ea194e1511049f5a6dd67abef53b53c5ea56c68a973b659772e4c",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-04-30T16:44:09Z",
    "title_canon_sha256": "9c038bdd260ab06690d2cd88fe78a169a2805f5bebd419a116c00fbda702a8ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.13361",
    "kind": "arxiv",
    "version": 1
  }
}