Pith Number

pith:7YIELBAE

pith:2019:7YIELBAEHYRLCPFCWUIAX2RDCU

not attested not anchored not stored refs pending

Linear maps preserving inner functions

Javad Mashreghi, Thomas Ransford

arxiv:1902.05906 v1 · 2019-02-15 · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7YIELBAEHYRLCPFCWUIAX2RDCU}

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	2026-05-17T23:53:55.159885Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe104584043e22b13ca2b5100bea23150c39dd14e74b4ae4a078e420674dae36

Aliases

arxiv: 1902.05906 · arxiv_version: 1902.05906v1 · doi: 10.48550/arxiv.1902.05906 · pith_short_12: 7YIELBAEHYRL · pith_short_16: 7YIELBAEHYRLCPFC · pith_short_8: 7YIELBAE

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/7YIELBAEHYRLCPFCWUIAX2RDCU \
  | 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: fe104584043e22b13ca2b5100bea23150c39dd14e74b4ae4a078e420674dae36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aacd0d4c2dd02fc96156bbbfa8950e34e1dabb92ea734e0616fcce8239f29614",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2019-02-15T17:47:50Z",
    "title_canon_sha256": "3f60bf0dd3924a2111902a106de556f0e67710d7c6a636c99772e8d57a722c1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.05906",
    "kind": "arxiv",
    "version": 1
  }
}