Pith Number

pith:3L7DNGEW

pith:2012:3L7DNGEWLLUL725FFZ2ZA2XMVI

not attested not anchored not stored refs pending

Logarithmic barriers for sparse matrix cones

Joachim Dahl, Lieven Vandenberghe, Martin S. Andersen

arxiv:1203.2742 v1 · 2012-03-13 · math.OC · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3L7DNGEWLLUL725FFZ2ZA2XMVI}

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	2026-05-18T03:53:42.163533Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dafe3698965ae8bfeba52e75906aecaa3374fd5c1662e8758fac8dc8362c073a

Aliases

arxiv: 1203.2742 · arxiv_version: 1203.2742v1 · doi: 10.48550/arxiv.1203.2742 · pith_short_12: 3L7DNGEWLLUL · pith_short_16: 3L7DNGEWLLUL725F · pith_short_8: 3L7DNGEW

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/3L7DNGEWLLUL725FFZ2ZA2XMVI \
  | 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: dafe3698965ae8bfeba52e75906aecaa3374fd5c1662e8758fac8dc8362c073a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "295ca2be88718c89b189c2a3527f945c88ab3409359ba4030385e87be03d8ff4",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-03-13T08:59:26Z",
    "title_canon_sha256": "a11e373f4d90f0246837bdb3389f4de9e3a4f912567f3f5585ef563a876f5064"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.2742",
    "kind": "arxiv",
    "version": 1
  }
}