Pith Number

pith:VHXY5SFO

pith:2009:VHXY5SFOA7RMCXC36USUGJJIKN

not attested not anchored not stored refs pending

The Residual Method for Regularizing Ill-Posed Problems

Markus Grasmair, Markus Haltmeier, Otmar Scherzer

arxiv:0905.1187 v3 · 2009-05-08 · math.OC · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VHXY5SFOA7RMCXC36USUGJJIKN}

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	2026-05-18T03:39:14.904203Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9ef8ec8ae07e2c15c5bf5254325285373b706cbb5fa98f85e25b7d81074bc06

Aliases

arxiv: 0905.1187 · arxiv_version: 0905.1187v3 · doi: 10.48550/arxiv.0905.1187 · pith_short_12: VHXY5SFOA7RM · pith_short_16: VHXY5SFOA7RMCXC3 · pith_short_8: VHXY5SFO

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/VHXY5SFOA7RMCXC36USUGJJIKN \
  | 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: a9ef8ec8ae07e2c15c5bf5254325285373b706cbb5fa98f85e25b7d81074bc06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8da1391330181b7226f310c280573f2a5d403a84d3c5ecc1f6b436f97ca2979b",
    "cross_cats_sorted": [
      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2009-05-08T13:38:17Z",
    "title_canon_sha256": "a7447a10767bb9db3cdc83ff5c7694948fe87f99a873c7b2eb86bdc295619d26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1187",
    "kind": "arxiv",
    "version": 3
  }
}