Pith Number

pith:FXPMEDLT

pith:2018:FXPMEDLTQIUPUFN2OJG4XOWR5P

not attested not anchored not stored refs pending

Spectral Filtering of Interpolant Observables for a Discrete-in-time Downscaling Data Assimilation Algorithm

Edriss S. Titi, Emine Celik, Eric Olson

arxiv:1809.08654 v3 · 2018-09-23 · math.DS · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FXPMEDLTQIUPUFN2OJG4XOWR5P}

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	2026-05-17T23:51:14.250751Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ddec20d738228fa15ba724dcbbad1ebc179bf0d92eb04abf4f81026a449dae2

Aliases

arxiv: 1809.08654 · arxiv_version: 1809.08654v3 · doi: 10.48550/arxiv.1809.08654 · pith_short_12: FXPMEDLTQIUP · pith_short_16: FXPMEDLTQIUPUFN2 · pith_short_8: FXPMEDLT

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/FXPMEDLTQIUPUFN2OJG4XOWR5P \
  | 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: 2ddec20d738228fa15ba724dcbbad1ebc179bf0d92eb04abf4f81026a449dae2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07fdb70d460d4aef7640176bba71653cb81df2f402e732918cab3a8458218897",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2018-09-23T18:22:15Z",
    "title_canon_sha256": "4a82538e0e5898cfe2323a3dace08f77a261ddc13256cd565f30e4f493c0d233"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.08654",
    "kind": "arxiv",
    "version": 3
  }
}