r.kurtosis.html)
      * [ polars.Expr.log ](../../expressions/api/polars.Expr.log.html)
      * [ polars.Expr.log10 ](../../expressions/api/polars.Expr.log10.html)
      * [ polars.Expr.log1p ](../../expressions/api/polars.Expr.log1p.html)
      * [ polars.Expr.mode ](../../expressions/api/polars.Expr.mode.html)
      * [ polars.Expr.n_unique ](../../expressions/api/polars.Expr.n_unique.html)
      * [ polars.Expr.null_count ](../../expressions/api/polars.Expr.null_count.html)
      * [ polars.Expr.pct_change ](../../expressions/api/polars.Expr.pct_change.html)
      * [ polars.Expr.peak_max ](../../expressions/api/polars.Expr.peak_max.html)
      * [ polars.Expr.peak_min ](../../expressions/api/polars.Expr.peak_min.html)
      * [ polars.Expr.radians ](../../expressions/api/polars.Expr.radians.html)
      * [ polars.Expr.rank ](../../expressions/api/polars.Expr.rank.html)
      * [ polars.Expr.rolling_apply ](../../expressions/api/polars.Expr.rolling_apply.html)
      * [ polars.Expr.rolling_map ](../../expressions/api/polars.Expr.rolling_map.html)
      * [ polars.Expr.rolling_max ](../../expressions/api/polars.Expr.rolling_max.html)
      * [ polars.Expr.rolling_mean ](../../expressions/api/polars.Expr.rolling_mean.html)
      * [ polars.Expr.rolling_median ](../../expressions/api/polars.Expr.rolling_median.html)
      * [ polars.Expr.rolling_min ](../../expressions/api/polars.Expr.rolling_min.html)
      * [ polars.Expr.rolling_quantile ](../../expressions/api/polars.Expr.rolling_quantile.html)
      * [ polars.Expr.rolling_skew ](../../expressions/api/polars.Expr.rolling_skew.html)
      * [ polars.Expr.rolling_std ](../../expressions/api/polars.Expr.rolling_std.html)
      * [ polars.Expr.rolling_sum ](../../expressions/api/polars.Expr.rolling_sum.html)
      * [ polars.Expr.rolling_var ](../../expressions/api/polars.Expr.rolling_var.html)
      * [ polars.Expr.search_sorted ](../../expressions/api/polars.Expr.search_sorted.html)
      * [ polars.Expr.sign ](../../expressions/api/polars.Expr.sign.html)
      * [ polars.Expr.sin ](../../expressions/api/polars.Expr.sin.html)
      * [ polars.Expr.sinh ](../../expressions/api/polars.Expr.sinh.html)
      * [ polars.Expr.skew ](../../expressions/api/polars.Expr.skew.html)
      * [ polars.Expr.sqrt ](../../expressions/api/polars.Expr.sqrt.html)
      * [ polars.Expr.tan ](../../expressions/api/polars.Expr.tan.html)
      * [ polars.Expr.tanh ](../../expressions/api/polars.Expr.tanh.html)
      * [ polars.Expr.unique ](../../expressions/api/polars.Expr.unique.html)
      * [ polars.Expr.unique_counts ](../../expressions/api/polars.Expr.unique_counts.html)
      * [ polars.Expr.value_counts ](../../expressions/api/polars.Expr.value_counts.html)
    * [ Functions ](../../expressions/functions.html) __
      * [ polars.all ](../../expressions/api/polars.all.html)
      * [ polars.all_horizontal ](../../expressions/api/polars.all_horizontal.html)
      * [ polars.any ](../../expressions/api/polars.any.html)
      * [ polars.any_horizontal ](../../expressions/api/polars.any_horizontal.html)
      * [ polars.apply ](../../expressions/api/polars.apply.html)
      * [ polars.approx_n_unique ](../../expressions/api/polars.approx_n_unique.html)
      * [ polars.arange ](../../expressions/api/polars.arange.html)
      * [ polars.arctan2 ](../../expressions/api/polars.arctan2.html)
      * [ polars.arctan2d ](../../expressions/api/polars.arctan2d.html)
      * [ polars.arg_sort_by ](../../expressions/api/polars.arg_sort_by.html)
      * [ polars.arg_where ](../../expressions/api/polars.arg_where.html)
      * [ polars.business_day_count ](../../expressions/api/polars.business_day_count.html)
      * [ polars.coalesce ](../../expressions/api/polars.coalesce.html)
      * [ polars.concat_list ](../../expressions/api/polars.concat_list.html)
      * [ polars.concat_str ](../../expressions/api/polars.concat_str.html)
      * [ polars.corr ](../../expressions/api/polars.corr.html)
      * [