Pith Number

pith:X5JDEQ7H

pith:2011:X5JDEQ7HQEXFO2GPD6J35K44IN

not attested not anchored not stored refs pending

A numerical method for variational problems with convexity constraints

Adam M. Oberman

arxiv:1107.5290 v3 · 2011-07-26 · 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{X5JDEQ7HQEXFO2GPD6J35K44IN}

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	2026-05-18T02:21:42.603475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf523243e7812e5768cf1f93beab9c4375749388950a62adcba6647cd00ccc49

Aliases

arxiv: 1107.5290 · arxiv_version: 1107.5290v3 · doi: 10.48550/arxiv.1107.5290 · pith_short_12: X5JDEQ7HQEXF · pith_short_16: X5JDEQ7HQEXFO2GP · pith_short_8: X5JDEQ7H

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/X5JDEQ7HQEXFO2GPD6J35K44IN \
  | 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: bf523243e7812e5768cf1f93beab9c4375749388950a62adcba6647cd00ccc49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26842c5b24027447c32185ad8b07e3f75581afb732ee88c507dc474661880a25",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-07-26T18:31:44Z",
    "title_canon_sha256": "c42d0e5b1dff3494984b6ef3994c810501ec2429ea1ef613b8ebcb9883c63799"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5290",
    "kind": "arxiv",
    "version": 3
  }
}