Pith Number

pith:7WN2C6QD

pith:2014:7WN2C6QDP3OU65SLS4UAPDP5EC

not attested not anchored not stored refs pending

Broken ray transform on a Riemann surface with a convex obstacle

Joonas Ilmavirta, Mikko Salo

arxiv:1403.5131 v3 · 2014-03-20 · math.DG · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7WN2C6QDP3OU65SLS4UAPDP5EC}

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	2026-05-18T01:12:18.805382Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd9ba17a037edd4f764b9728078dfd209beaa91be8f35904481ef39acc2bf5e4

Aliases

arxiv: 1403.5131 · arxiv_version: 1403.5131v3 · doi: 10.48550/arxiv.1403.5131 · pith_short_12: 7WN2C6QDP3OU · pith_short_16: 7WN2C6QDP3OU65SL · pith_short_8: 7WN2C6QD

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/7WN2C6QDP3OU65SLS4UAPDP5EC \
  | 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: fd9ba17a037edd4f764b9728078dfd209beaa91be8f35904481ef39acc2bf5e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0581fb7c1aa9c5860e0f70e84fe48b2130d94f4cc085902fc919a92864bd4786",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2014-03-20T13:28:50Z",
    "title_canon_sha256": "1b238ec68551b9ca487aad7c76e6371b37dfb8b96383df1fd080b7c23a7dfb4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.5131",
    "kind": "arxiv",
    "version": 3
  }
}