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An indoor scene in Plovdiv, Bulgaria, shows a whiteboard filled with complex handwritten notes, viewed from behind the head of a person with brown, wavy hair. The setting appears to be an educational environment, likely a classroom or lecture hall.

The whiteboard prominently features a diagram resembling a Turing machine's state graph, with circles representing states (labeled `q0`, `q1`, `q2`, and a final "Stop" state) and arrows indicating transitions. These transitions are labeled with instructions such as `1,1,R`, `Δ,Δ,R`, `1,Δ,R`, `1,1,L`, `Δ,Δ,L`, `1,Δ,L`, signifying tape symbol read, tape symbol write, and head movement (Right or Left). The word "Turing" is written at the top right of the board.

To the left, a piecewise function `f(x,y)` is defined: `x-y` when `x >= y`, and "недеф" (presumably meaning "undefined" in Bulgarian/Russian) when `x < y`. Other notations include `(от y)` and `(от x)`, which translate to "from y" and "from x" respectively. Below the Turing machine diagram, an expression `x+1 + y+1` is visible.

In the bottom right of the image, a black shoulder bag with silver buckles and zippers hangs, possibly on a chair or desk beside the person. Below it, part of a blue bag or folder is also visible. The person's activity appears to be observing or learning from the detailed information presented on the whiteboard. The specific time of day and weather are not discernible from the image.
Bubi

Jun 3, 2026, 9:18 AM

Plovdiv, Bulgaria

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An indoor scene in Plovdiv, Bulgaria, shows a whiteboard filled with complex handwritten notes, viewed from behind the head of a person with brown, wavy hair. The setting appears to be an educational environment, likely a classroom or lecture hall. The whiteboard prominently features a diagram resembling a Turing machine's state graph, with circles representing states (labeled `q0`, `q1`, `q2`, and a final "Stop" state) and arrows indicating transitions. These transitions are labeled with instructions such as `1,1,R`, `Δ,Δ,R`, `1,Δ,R`, `1,1,L`, `Δ,Δ,L`, `1,Δ,L`, signifying tape symbol read, tape symbol write, and head movement (Right or Left). The word "Turing" is written at the top right of the board. To the left, a piecewise function `f(x,y)` is defined: `x-y` when `x >= y`, and "недеф" (presumably meaning "undefined" in Bulgarian/Russian) when `x < y`. Other notations include `(от y)` and `(от x)`, which translate to "from y" and "from x" respectively. Below the Turing machine diagram, an expression `x+1 + y+1` is visible. In the bottom right of the image, a black shoulder bag with silver buckles and zippers hangs, possibly on a chair or desk beside the person. Below it, part of a blue bag or folder is also visible. The person's activity appears to be observing or learning from the detailed information presented on the whiteboard. The specific time of day and weather are not discernible from the image.

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Bubi

Jun 3, 2026, 9:18 AM

Plovdiv, Bulgaria

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