Pith Number

pith:Y34ALLNS

pith:2004:Y34ALLNSG7RXKKYS4DKIQXQYI6

not attested not anchored not stored refs pending

Approximation Algorithms for Minimum PCR Primer Set Selection with Amplification Length and Uniqueness Constraints

A. Russell, A. Shvartsman, I. Mandoiu, K. Konwar

arxiv:cs/0406053 v2 · 2004-06-28 · cs.DS · cs.DM · q-bio.QM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y34ALLNSG7RXKKYS4DKIQXQYI6}

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	2026-07-04T14:24:44.604075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6f805adb237e3752b12e0d4885e1847ac764e6cc408066b77acc71dfc601c30

Aliases

arxiv: cs/0406053 · arxiv_version: cs/0406053v2 · doi: 10.48550/arxiv.cs/0406053 · pith_short_12: Y34ALLNSG7RX · pith_short_16: Y34ALLNSG7RXKKYS · pith_short_8: Y34ALLNS

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/Y34ALLNSG7RXKKYS4DKIQXQYI6 \
  | 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: c6f805adb237e3752b12e0d4885e1847ac764e6cc408066b77acc71dfc601c30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "554f654da0a0ab362d18449410a1f374c179a97d9aa78a7c26236ad976080474",
    "cross_cats_sorted": [
      "cs.DM",
      "q-bio.QM"
    ],
    "license": "",
    "primary_cat": "cs.DS",
    "submitted_at": "2004-06-28T07:04:14Z",
    "title_canon_sha256": "eaea12e976f1cfc61db3140ebf1e1fd85eb67f9edc0a1b792f33c594e44e22ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0406053",
    "kind": "arxiv",
    "version": 2
  }
}