Pith Number

pith:WMGIEBYO

pith:2011:WMGIEBYOVX7NMRZTOAX3XCIVI6

not attested not anchored not stored refs pending

On Kahan's Rules for Determining Branch Cuts

Bruno Salvy (INRIA Rocquencourt), Christoph Koutschan (RISC), Fr\'ed\'eric Chyzak (INRIA Rocquencourt), James Davenport

arxiv:1109.2809 v2 · 2011-09-13 · cs.SC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WMGIEBYOVX7NMRZTOAX3XCIVI6}

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	2026-05-18T03:20:45.585216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b30c82070eadfed64733702fbb891547b953680ae47727abfb87888a32febb3f

Aliases

arxiv: 1109.2809 · arxiv_version: 1109.2809v2 · doi: 10.48550/arxiv.1109.2809 · pith_short_12: WMGIEBYOVX7N · pith_short_16: WMGIEBYOVX7NMRZT · pith_short_8: WMGIEBYO

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/WMGIEBYOVX7NMRZTOAX3XCIVI6 \
  | 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: b30c82070eadfed64733702fbb891547b953680ae47727abfb87888a32febb3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "438b505887dc386fac6025676debf6b1c991dedd743734d32f56fdac9b9f2097",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SC",
    "submitted_at": "2011-09-13T14:52:47Z",
    "title_canon_sha256": "6b9e5e766568d7ed7a68ab4c3c5fe161a33693774707ec8c975b345fe8f786e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2809",
    "kind": "arxiv",
    "version": 2
  }
}