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Table 1 Notations

From: Achieve data privacy and clustering accuracy simultaneously through quantized data recovery

Si

The ith subspace

\(L^{*}_{i}\)

Columns of matrix L∗ belonging to the ith subspace

\(L^{*}_{\star i}\)

The ith column of matrix L∗

\(L^{*}_{i\star }\)

The ith row of matrix L∗

\(L^{*}_{i,j}\)

Entry on the ith row and jth column of matrix L∗

[p]

The set {1,...,p}

Φi

Index set containing {q(i−1)+1,q(i−1)+2,...,qi}

\(C_{\Phi _{i}}\)

Columns of matrix C belonging to the set Φi

\(C_{\Phi _{i}\star }\)

Rows of matrix C belonging to the set Φi

\((C_{\Phi _{i}})_{\Phi _{j}\star }\)

Rows of matrix \(C_{\Phi _{i}}\) belonging to the set Φj

\(C_{\Phi _{i} \star }^{T}\)

The transpose of \(C_{\Phi _{i} \star }\)