Pith Number

pith:NCXPMJ34

pith:2011:NCXPMJ34YFQNDFAPNHGWCBAKN5

not attested not anchored not stored refs pending

The C++0x "Concepts" Effort

Jeremy G. Siek

arxiv:1201.0027 v1 · 2011-12-29 · 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{NCXPMJ34YFQNDFAPNHGWCBAKN5}

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	2026-05-18T04:05:26.433944Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68aef6277cc160d1940f69cd61040a6f4f1bf215519a0902aa2705badf64d5a0

Aliases

arxiv: 1201.0027 · arxiv_version: 1201.0027v1 · doi: 10.48550/arxiv.1201.0027 · pith_short_12: NCXPMJ34YFQN · pith_short_16: NCXPMJ34YFQNDFAP · pith_short_8: NCXPMJ34

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/NCXPMJ34YFQNDFAPNHGWCBAKN5 \
  | 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: 68aef6277cc160d1940f69cd61040a6f4f1bf215519a0902aa2705badf64d5a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "57f2364ab14784ff853711fa7ec5d468227d527c3681a04768ec2f0d89022cbe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2011-12-29T21:38:55Z",
    "title_canon_sha256": "ff6ba49b68bf62638730aa8ca731eb85469647c4e8f24d5bb9f2e98324950121"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0027",
    "kind": "arxiv",
    "version": 1
  }
}