Pith Number

pith:VFS7QMYM

pith:2012:VFS7QMYMTQZOQ6M3B6GB7TG4RB

not attested not anchored not stored refs pending

The Meaning of Requirements and Adaptation

Amit K. Chopra

arxiv:1209.1551 v1 · 2012-09-07 · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VFS7QMYMTQZOQ6M3B6GB7TG4RB}

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	2026-05-18T03:46:04.535717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a965f8330c9c32e8799b0f8c1fccdc885ab133404c32e0bb5dca1b4cf0ed1f8f

Aliases

arxiv: 1209.1551 · arxiv_version: 1209.1551v1 · doi: 10.48550/arxiv.1209.1551 · pith_short_12: VFS7QMYMTQZO · pith_short_16: VFS7QMYMTQZOQ6M3 · pith_short_8: VFS7QMYM

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/VFS7QMYMTQZOQ6M3B6GB7TG4RB \
  | 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: a965f8330c9c32e8799b0f8c1fccdc885ab133404c32e0bb5dca1b4cf0ed1f8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9d3a03bfd675b6d286a27f70308248c5f187a1b2eae964eeb5f84e982c64a0a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2012-09-07T14:30:28Z",
    "title_canon_sha256": "cf33c93db03cae5d4aca53444fcf9cec2b89a8d58d8fdea820838494b3ed0678"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.1551",
    "kind": "arxiv",
    "version": 1
  }
}