Pith Number

pith:NCWXPPY2

pith:2019:NCWXPPY2M5VL6DJ7ZJXXEWX72Z

not attested not anchored not stored refs pending

The admissibility theorem for the spatial X-ray transform over the two element field

Eric L. Grinberg

arxiv:1907.04200 v1 · 2019-07-08 · 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{NCWXPPY2M5VL6DJ7ZJXXEWX72Z}

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	2026-05-17T23:41:03.023786Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68ad77bf1a676abf0d3fca6f725affd65783b1cb7156dd0f3884778edc51dfc5

Aliases

arxiv: 1907.04200 · arxiv_version: 1907.04200v1 · doi: 10.48550/arxiv.1907.04200 · pith_short_12: NCWXPPY2M5VL · pith_short_16: NCWXPPY2M5VL6DJ7 · pith_short_8: NCWXPPY2

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/NCWXPPY2M5VL6DJ7ZJXXEWX72Z \
  | 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: 68ad77bf1a676abf0d3fca6f725affd65783b1cb7156dd0f3884778edc51dfc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a066a524e2d8088dbf53706ab0eb8655d2c551576f36121b44eccc51cd66b08c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-07-08T12:30:24Z",
    "title_canon_sha256": "7838b24b008fa1cf22f275e40d0329358b3f03cf31587fb3d3c345077a0813aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04200",
    "kind": "arxiv",
    "version": 1
  }
}