Pith Number

pith:7TMRQXAZ

pith:2013:7TMRQXAZE3U3W7AVZTG3IDDSTC

not attested not anchored not stored refs pending

A generalization of variable elimination for separable inverse problems beyond least squares

Anna C. Gilbert, Paul Shearer

arxiv:1302.0441 v2 · 2013-02-03 · math.OC · math.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{7TMRQXAZE3U3W7AVZTG3IDDSTC}

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	2026-05-18T01:51:51.088835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fcd9185c1926e9bb7c15cccdb40c7298b9573f9f55a22a232424da1af774d475

Aliases

arxiv: 1302.0441 · arxiv_version: 1302.0441v2 · doi: 10.48550/arxiv.1302.0441 · pith_short_12: 7TMRQXAZE3U3 · pith_short_16: 7TMRQXAZE3U3W7AV · pith_short_8: 7TMRQXAZ

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/7TMRQXAZE3U3W7AVZTG3IDDSTC \
  | 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: fcd9185c1926e9bb7c15cccdb40c7298b9573f9f55a22a232424da1af774d475

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bc23928dfe2981dacf66e5e5a8de6423dcc884ee7724968fba3a9b19941597c",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-02-03T00:58:49Z",
    "title_canon_sha256": "57f1c222ddb3ae3d3f21b91771c21572ab5cdff35fde5b32c57116a07c8691d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.0441",
    "kind": "arxiv",
    "version": 2
  }
}