Pith Number

pith:I6VWHWQ6

pith:2019:I6VWHWQ6Z4JKBYYIGJPDQRHDLH

not attested not anchored not stored refs pending

A sparse spectral method on triangles

Alex Townsend, Geoff Vasil, Sheehan Olver

arxiv:1902.04863 v1 · 2019-02-13 · 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{I6VWHWQ6Z4JKBYYIGJPDQRHDLH}

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	2026-05-17T23:54:05.707340Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

47ab63da1ecf12a0e308325e3844e359f6028fa9fb5c3323c88ce890a09ccd9c

Aliases

arxiv: 1902.04863 · arxiv_version: 1902.04863v1 · doi: 10.48550/arxiv.1902.04863 · pith_short_12: I6VWHWQ6Z4JK · pith_short_16: I6VWHWQ6Z4JKBYYI · pith_short_8: I6VWHWQ6

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/I6VWHWQ6Z4JKBYYIGJPDQRHDLH \
  | 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: 47ab63da1ecf12a0e308325e3844e359f6028fa9fb5c3323c88ce890a09ccd9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fa9f4c5f3c7c240918cfda9851755bcefb8b3d4256341c61b5114d43283ac1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-02-13T11:07:47Z",
    "title_canon_sha256": "53f19a1e5fb75f21ae5a38c6fbefcf456673e6c123057e0dc920595171fc2e0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.04863",
    "kind": "arxiv",
    "version": 1
  }
}