discussed Cited "see, e.g." Goguen v. Commissioner of Correction The Appellate Court has recognized on several occa- sions that, ‘‘[i]n determining whether the habeas court abused its discretion in denying the petitioner’s request for certification, [the court] necessarily must consider the merits of the petitioner’s underlying claims to deter- mine whether the habeas court reasonably determined that the petitioner’s appeal was frivolous.’’ (Internal quotation marks omitted.) McClain v. Commissioner of Correction, supra, 188 Conn. App. 75 ; see, e.g., Mer- cado v. Commissioner of Correction, 183 Conn. App. 556, 562 , 193 A.3d 671 (‘‘[w]e e…