Pith Number

pith:QLBUQA7D

pith:2019:QLBUQA7DG5VXYX64BPR5HBTTUV

not attested not anchored not stored refs pending

Structured inversion of the Bernstein mass matrix

Larray Allen, Robert C. Kirby

arxiv:1907.05773 v1 · 2019-07-12 · 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{QLBUQA7DG5VXYX64BPR5HBTTUV}

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	2026-05-17T23:40:44.455273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82c34803e3376b7c5fdc0be3d38673a572d01d95d4a23985d3a135bda2c6d984

Aliases

arxiv: 1907.05773 · arxiv_version: 1907.05773v1 · doi: 10.48550/arxiv.1907.05773 · pith_short_12: QLBUQA7DG5VX · pith_short_16: QLBUQA7DG5VXYX64 · pith_short_8: QLBUQA7D

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/QLBUQA7DG5VXYX64BPR5HBTTUV \
  | 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: 82c34803e3376b7c5fdc0be3d38673a572d01d95d4a23985d3a135bda2c6d984

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "797fcaa132c0fed0895b96a5927b629c9e1137af6faa3280735ba22abab31c79",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-07-12T14:51:47Z",
    "title_canon_sha256": "f98f51db6c58fbf583587819a16bdc4b9b9e4b82488e187020f84bbdb8aa0ee5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.05773",
    "kind": "arxiv",
    "version": 1
  }
}