Pith Number

pith:CI3MT3E3

pith:2019:CI3MT3E3554OGG6ISZEVIPQB3C

not attested not anchored not stored refs pending

Quasi-best approximation in optimization with PDE constraints

Andreas Veeser, Christian Kreuzer, Fernando Gaspoz, Winnifried Wollner

arxiv:1904.07049 v1 · 2019-04-15 · math.NA · cs.NA · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CI3MT3E3554OGG6ISZEVIPQB3C}

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	2026-06-04T20:14:25.283028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1236c9ec9bef78e31bc89649543e01d89d8a86639f194cf632951249923a0f3b

Aliases

arxiv: 1904.07049 · arxiv_version: 1904.07049v1 · doi: 10.48550/arxiv.1904.07049 · pith_short_12: CI3MT3E3554O · pith_short_16: CI3MT3E3554OGG6I · pith_short_8: CI3MT3E3

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/CI3MT3E3554OGG6ISZEVIPQB3C \
  | 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: 1236c9ec9bef78e31bc89649543e01d89d8a86639f194cf632951249923a0f3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f42b0700e687a17733c0120a68a5a8997ab9c3c51d0a1e6da57d253aed33c296",
    "cross_cats_sorted": [
      "cs.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-15T13:55:09Z",
    "title_canon_sha256": "0edc9c8b86080920c3d9464e3fbee581d10ba91ca0ed00cf535a6c9d1bc40275"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.07049",
    "kind": "arxiv",
    "version": 1
  }
}