<div dir="ltr">Merhabalar;<div>Kara tahta ve tebeşiri beyaz tahta ve kaleme tercih edenler için:</div><div><br></div><div><a href="https://www.nytimes.com/2019/09/23/science/mathematicians-blackboard-photographs-jessica-wynne.html?te=1&nl=evening-briefing&emc=edit_ne_20190924?campaign_id=57&instance_id=12614&segment_id=17298&user_id=f619c15eea7898e4599a9ba6f6e7dfda&regi_id=76742451" rel="noreferrer" target="_blank">https://www.nytimes.com/2019/09/23/science/mathematicians-blackboard-photographs-jessica-wynne.html?te=1&nl=evening-briefing&emc=edit_ne_20190924?campaign_id=57&instance_id=12614&segment_id=17298&user_id=f619c15eea7898e4599a9ba6f6e7dfda&regi_id=76742451</a><br></div></div>