Pith Number

pith:EQ7WVW6N

pith:2019:EQ7WVW6NDMEPC57TFNXAEFTEVY

not attested not anchored not stored refs pending

Towards solving large scale topology optimization problems with buckling constraints at the cost of linear analyses

Federico Ferrari, Ole Sigmund

arxiv:1909.13585 v2 · 2019-09-30 · math.NA · 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{EQ7WVW6NDMEPC57TFNXAEFTEVY}

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	2026-07-05T00:44:56.741808Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

243f6adbcd1b08f177f32b6e021664ae1a735712d0e2d193e6c9cb5933b9ca98

Aliases

arxiv: 1909.13585 · arxiv_version: 1909.13585v2 · doi: 10.48550/arxiv.1909.13585 · pith_short_12: EQ7WVW6NDMEP · pith_short_16: EQ7WVW6NDMEPC57T · pith_short_8: EQ7WVW6N

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/EQ7WVW6NDMEPC57TFNXAEFTEVY \
  | 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: 243f6adbcd1b08f177f32b6e021664ae1a735712d0e2d193e6c9cb5933b9ca98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30dd04571ff44c67f71b9291c9c0503e4a08637a1c4b0febc5c36a13374304ba",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-09-30T11:02:42Z",
    "title_canon_sha256": "b4c87b5d0b3676e479f43658d89bda9a58321d421f11440e599e023f4439b601"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.13585",
    "kind": "arxiv",
    "version": 2
  }
}