Pith Number

pith:IZTDZ2XG

pith:2015:IZTDZ2XG5QDWZT5PJQITHNCON4

not attested not anchored not stored refs pending

Trust, but Verify: Two-Phase Typing for Dynamic Languages

Benjamin Cosman, Panagiotis Vekris, Ranjit Jhala

arxiv:1504.08039 v1 · 2015-04-29 · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IZTDZ2XG5QDWZT5PJQITHNCON4}

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	2026-05-18T02:17:23.481660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46663ceae6ec076ccfaf4c1133b44e6f0fa1ef05b6e164e808706dd465e75f1a

Aliases

arxiv: 1504.08039 · arxiv_version: 1504.08039v1 · doi: 10.48550/arxiv.1504.08039 · pith_short_12: IZTDZ2XG5QDW · pith_short_16: IZTDZ2XG5QDWZT5P · pith_short_8: IZTDZ2XG

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/IZTDZ2XG5QDWZT5PJQITHNCON4 \
  | 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: 46663ceae6ec076ccfaf4c1133b44e6f0fa1ef05b6e164e808706dd465e75f1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a82bd4c5de8315d03524a8e90b7466e95e70448c70c5f069b944452252575b5f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2015-04-29T22:31:14Z",
    "title_canon_sha256": "9efc4e9602327e56542138d813ca495a31631a13ac3ed1b4e820e98a66969cea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.08039",
    "kind": "arxiv",
    "version": 1
  }
}