Pith Number

pith:2CYS3T7Q

pith:2021:2CYS3T7QABTRYMKITD6X4MSB2V

not attested not anchored not stored refs pending

Managing Requirements Change the Informal Way: When Saying 'No' is Not an Option

Didar Zowghi, Kelly Blincoe, Stephen MacDonell, Tony Clear, Waqar Hussain

arxiv:2104.00843 v1 · 2021-04-02 · 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{2CYS3T7QABTRYMKITD6X4MSB2V}

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	2026-07-05T02:28:36.586024Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0b12dcff000671c314898fd7e3241d5662d07393bd5cee4dccf5bbc234f9d7c

Aliases

arxiv: 2104.00843 · arxiv_version: 2104.00843v1 · doi: 10.48550/arxiv.2104.00843 · pith_short_12: 2CYS3T7QABTR · pith_short_16: 2CYS3T7QABTRYMKI · pith_short_8: 2CYS3T7Q

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/2CYS3T7QABTRYMKITD6X4MSB2V \
  | 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: d0b12dcff000671c314898fd7e3241d5662d07393bd5cee4dccf5bbc234f9d7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cace6e52fc5830cae5bb8b9cfa6df269f02b61254fc0dfec876f62bdd3fa380b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2021-04-02T01:29:50Z",
    "title_canon_sha256": "c69b669ddf91d05a857b174752a5a2940ba2463b083c07003635cab0482ce579"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.00843",
    "kind": "arxiv",
    "version": 1
  }
}