Pith Number

pith:HMDF2O7D

pith:2015:HMDF2O7D47R6ACHGH6URNRIGLN

not attested not anchored not stored refs pending

The Inapproximability of Maximum Single-Sink Unsplittable, Priority and Confluent Flow Problems

Adrian Vetta, F. Bruce Shepherd

arxiv:1504.00627 v2 · 2015-04-02 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HMDF2O7D47R6ACHGH6URNRIGLN}

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	2026-05-18T02:09:41.073697Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b065d3be3e7e3e008e63fa916c5065b6bb37e3803051b516db0d8796725678e

Aliases

arxiv: 1504.00627 · arxiv_version: 1504.00627v2 · doi: 10.48550/arxiv.1504.00627 · pith_short_12: HMDF2O7D47R6 · pith_short_16: HMDF2O7D47R6ACHG · pith_short_8: HMDF2O7D

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/HMDF2O7D47R6ACHGH6URNRIGLN \
  | 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: 3b065d3be3e7e3e008e63fa916c5065b6bb37e3803051b516db0d8796725678e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d8db749f57d21d3960d97bb1148936fdc921e2eaef57a22892dac7aff2aacbb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-04-02T17:55:03Z",
    "title_canon_sha256": "75cce761f54895983e06655146cb45a80d4b48b028e3b7d61e25fa00edc1f32b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.00627",
    "kind": "arxiv",
    "version": 2
  }
}