[NTG-context] dot and comma in two consecutive cases

Hi, I have this: \startformula z_k = \startcases \NC x_k\MC 1 \leq k \leq N \NR \NC y_{k-N} \MC N+1 \leq k N+M \NR \stopcases t_k = \startcases \NC r_k\MC 1 \leq k \leq N \NR \NC s_{k-N} \MC N+1 \leq k N+M \NR \stopcases \stopformula but I want to punctuate that. When

Re: [NTG-context] dot and comma in two consecutive cases

On Sun, 24 May 2009, Xan wrote: Hi, I have this: \startformula z_k = \startcases \NC x_k\MC 1 \leq k \leq N \NR \NC y_{k-N} \MC N+1 \leq k N+M \NR \stopcases t_k = \startcases \NC r_k\MC 1 \leq k \leq N \NR \NC s_{k-N} \MC N+1 \leq k N+M \NR \stopcases \stopformula but I