Pith Number

pith:FDFYSRXQ

pith:2018:FDFYSRXQ2UWXEPMP62HZK3RZP4

not attested not anchored not stored refs pending

Why Software Effort Estimation Needs SBSE

George Mathew, Jianfeng Chen, Tianpei Xia, Tim Menzies, Xipeng Shen

arxiv:1804.00626 v1 · 2018-04-02 · 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{FDFYSRXQ2UWXEPMP62HZK3RZP4}

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	2026-05-18T00:19:36.435993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28cb8946f0d52d723d8ff68f956e397f2b45d8234dbbdec18d3543e9a36eeaca

Aliases

arxiv: 1804.00626 · arxiv_version: 1804.00626v1 · doi: 10.48550/arxiv.1804.00626 · pith_short_12: FDFYSRXQ2UWX · pith_short_16: FDFYSRXQ2UWXEPMP · pith_short_8: FDFYSRXQ

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/FDFYSRXQ2UWXEPMP62HZK3RZP4 \
  | 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: 28cb8946f0d52d723d8ff68f956e397f2b45d8234dbbdec18d3543e9a36eeaca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "447e40d3c10a2ea4fd82b1fb3248a974b4f8455f146db16f4f255c9da7ad678b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2018-04-02T17:14:50Z",
    "title_canon_sha256": "ddd6fe41561e971c4a12f3eea32114281b5390cbdf53f467b782630f99be1789"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.00626",
    "kind": "arxiv",
    "version": 1
  }
}